Finding the Fourth Proportional to 148,506.72, 204,930.72 and 81,438.72

Step by Step Solution

1. Step 1: Write the proportion equation
   148,506.72 : 204,930.72 = 81,438.72 : x
2. Step 2: Convert to fraction form
   148,506.72/204,930.72 = 81,438.72/x
3. Step 3: Cross multiply
   148,506.72x = 204,930.72 × 81,438.72
4. Step 4: Simplify right side
   148,506.72x = 16,689,295,525.48
5. Step 5: Solve for x
   x = 16,689,295,525.48/148,506.72
6. Step 6: Final answer
   x = 112,380.74