Finding the Fourth Proportional to 148,748.76, 205,273.15 and 81,680.76

Step by Step Solution

1. Step 1: Write the proportion equation
   148,748.76 : 205,273.15 = 81,680.76 : x
2. Step 2: Convert to fraction form
   148,748.76/205,273.15 = 81,680.76/x
3. Step 3: Cross multiply
   148,748.76x = 205,273.15 × 81,680.76
4. Step 4: Simplify right side
   148,748.76x = 16,766,866,899.59
5. Step 5: Solve for x
   x = 16,766,866,899.59/148,748.76
6. Step 6: Final answer
   x = 112,719.37