Finding the Fourth Proportional to 83,128.56, 114,716.70 and 45,402

Step by Step Solution

1. Step 1: Write the proportion equation
   83,128.56 : 114,716.70 = 45,402 : x
2. Step 2: Convert to fraction form
   83,128.56/114,716.70 = 45,402/x
3. Step 3: Cross multiply
   83,128.56x = 114,716.70 × 45,402
4. Step 4: Simplify right side
   83,128.56x = 5,208,367,613.40
5. Step 5: Solve for x
   x = 5,208,367,613.40/83,128.56
6. Step 6: Final answer
   x = 62,654.37