Finding the Fourth Proportional to 83,128.50, 114,717.94 and 45,402.75

Step by Step Solution

1. Step 1: Write the proportion equation
   83,128.50 : 114,717.94 = 45,402.75 : x
2. Step 2: Convert to fraction form
   83,128.50/114,717.94 = 45,402.75/x
3. Step 3: Cross multiply
   83,128.50x = 114,717.94 × 45,402.75
4. Step 4: Simplify right side
   83,128.50x = 5,208,509,836.83
5. Step 5: Solve for x
   x = 5,208,509,836.83/83,128.50
6. Step 6: Final answer
   x = 62,656.13