Finding the Fourth Proportional to 1,222,380.72, 1,686,800.95 and 678,473.72

Step by Step Solution

1. Step 1: Write the proportion equation
   1,222,380.72 : 1,686,800.95 = 678,473.72 : x
2. Step 2: Convert to fraction form
   1,222,380.72/1,686,800.95 = 678,473.72/x
3. Step 3: Cross multiply
   1,222,380.72x = 1,686,800.95 × 678,473.72
4. Step 4: Simplify right side
   1,222,380.72x = 1,144,450,115,457.76
5. Step 5: Solve for x
   x = 1,144,450,115,457.76/1,222,380.72
6. Step 6: Final answer
   x = 936,246.86