Finding the Fourth Proportional to 1,117,603.56, 1,542,326.22 and 688,131.48

Step by Step Solution

1. Step 1: Write the proportion equation
   1,117,603.56 : 1,542,326.22 = 688,131.48 : x
2. Step 2: Convert to fraction form
   1,117,603.56/1,542,326.22 = 688,131.48/x
3. Step 3: Cross multiply
   1,117,603.56x = 1,542,326.22 × 688,131.48
4. Step 4: Simplify right side
   1,117,603.56x = 1,061,323,224,411.41
5. Step 5: Solve for x
   x = 1,061,323,224,411.41/1,117,603.56
6. Step 6: Final answer
   x = 949,641.95