Finding the Fourth Proportional to 132,558.30, 182,930.28 and 72,128.82

Step by Step Solution

1. Step 1: Write the proportion equation
   132,558.30 : 182,930.28 = 72,128.82 : x
2. Step 2: Convert to fraction form
   132,558.30/182,930.28 = 72,128.82/x
3. Step 3: Cross multiply
   132,558.30x = 182,930.28 × 72,128.82
4. Step 4: Simplify right side
   132,558.30x = 13,194,545,238.67
5. Step 5: Solve for x
   x = 13,194,545,238.67/132,558.30
6. Step 6: Final answer
   x = 99,537.68