Finding the Fourth Proportional to 83,890.62, 125,857.71 and 31,300.50

Step by Step Solution

1. Step 1: Write the proportion equation
   83,890.62 : 125,857.71 = 31,300.50 : x
2. Step 2: Convert to fraction form
   83,890.62/125,857.71 = 31,300.50/x
3. Step 3: Cross multiply
   83,890.62x = 125,857.71 × 31,300.50
4. Step 4: Simplify right side
   83,890.62x = 3,939,409,251.86
5. Step 5: Solve for x
   x = 3,939,409,251.86/83,890.62
6. Step 6: Final answer
   x = 46,958.88