Finding the Fourth Proportional to 137,580.72, 189,871.56 and 77,151.12

Step by Step Solution

1. Step 1: Write the proportion equation
   137,580.72 : 189,871.56 = 77,151.12 : x
2. Step 2: Convert to fraction form
   137,580.72/189,871.56 = 77,151.12/x
3. Step 3: Cross multiply
   137,580.72x = 189,871.56 × 77,151.12
4. Step 4: Simplify right side
   137,580.72x = 14,648,803,510.15
5. Step 5: Solve for x
   x = 14,648,803,510.15/137,580.72
6. Step 6: Final answer
   x = 106,474.25