Finding the Fourth Proportional to 148,475.20, 204,898.56 and 81,406.72

Step by Step Solution

1. Step 1: Write the proportion equation
   148,475.20 : 204,898.56 = 81,406.72 : x
2. Step 2: Convert to fraction form
   148,475.20/204,898.56 = 81,406.72/x
3. Step 3: Cross multiply
   148,475.20x = 204,898.56 × 81,406.72
4. Step 4: Simplify right side
   148,475.20x = 16,680,119,702.32
5. Step 5: Solve for x
   x = 16,680,119,702.32/148,475.20
6. Step 6: Final answer
   x = 112,342.80