Finding the Fourth Proportional to 1,242,697,974.72, 1,714,959,562.83 and 678,219,061.53

Step by Step Solution

1. Step 1: Write the proportion equation
   1,242,697,974.72 : 1,714,959,562.83 = 678,219,061.53 : x
2. Step 2: Convert to fraction form
   1,242,697,974.72/1,714,959,562.83 = 678,219,061.53/x
3. Step 3: Cross multiply
   1,242,697,974.72x = 1,714,959,562.83 × 678,219,061.53
4. Step 4: Simplify right side
   1,242,697,974.72x = 1,163,118,265,264,461,568
5. Step 5: Solve for x
   x = 1,163,118,265,264,461,568/1,242,697,974.72
6. Step 6: Final answer
   x = 935,962,147.62