Finding the Fourth Proportional to 83,738.72, 115,443.96 and 66,800.45

Step by Step Solution

1. Step 1: Write the proportion equation
   83,738.72 : 115,443.96 = 66,800.45 : x
2. Step 2: Convert to fraction form
   83,738.72/115,443.96 = 66,800.45/x
3. Step 3: Cross multiply
   83,738.72x = 115,443.96 × 66,800.45
4. Step 4: Simplify right side
   83,738.72x = 7,711,708,477.78
5. Step 5: Solve for x
   x = 7,711,708,477.78/83,738.72
6. Step 6: Final answer
   x = 92,092.50