Finding the Fourth Proportional to 1,224,763.48, 1,690,077.88 and 680,866.18

Step by Step Solution

1. Step 1: Write the proportion equation
   1,224,763.48 : 1,690,077.88 = 680,866.18 : x
2. Step 2: Convert to fraction form
   1,224,763.48/1,690,077.88 = 680,866.18/x
3. Step 3: Cross multiply
   1,224,763.48x = 1,690,077.88 × 680,866.18
4. Step 4: Simplify right side
   1,224,763.48x = 1,150,716,870,058.10
5. Step 5: Solve for x
   x = 1,150,716,870,058.10/1,224,763.48
6. Step 6: Final answer
   x = 939,542.11