Finding the Fourth Proportional to 1,260,406.49, 1,739,359.91 and 687,444.89

Step by Step Solution

1. Step 1: Write the proportion equation
   1,260,406.49 : 1,739,359.91 = 687,444.89 : x
2. Step 2: Convert to fraction form
   1,260,406.49/1,739,359.91 = 687,444.89/x
3. Step 3: Cross multiply
   1,260,406.49x = 1,739,359.91 × 687,444.89
4. Step 4: Simplify right side
   1,260,406.49x = 1,195,714,075,022.17
5. Step 5: Solve for x
   x = 1,195,714,075,022.17/1,260,406.49
6. Step 6: Final answer
   x = 948,673.38