Finding the Fourth Proportional to 102,726.05, 141,759.23 and 57,404.40

Step by Step Solution

1. Step 1: Write the proportion equation
   102,726.05 : 141,759.23 = 57,404.40 : x
2. Step 2: Convert to fraction form
   102,726.05/141,759.23 = 57,404.40/x
3. Step 3: Cross multiply
   102,726.05x = 141,759.23 × 57,404.40
4. Step 4: Simplify right side
   102,726.05x = 8,137,603,255.59
5. Step 5: Solve for x
   x = 8,137,603,255.59/102,726.05
6. Step 6: Final answer
   x = 79,216.55