Finding the Fourth Proportional to 137,356.61, 189,474.72 and 79,989.17

Step by Step Solution

1. Step 1: Write the proportion equation
   137,356.61 : 189,474.72 = 79,989.17 : x
2. Step 2: Convert to fraction form
   137,356.61/189,474.72 = 79,989.17/x
3. Step 3: Cross multiply
   137,356.61x = 189,474.72 × 79,989.17
4. Step 4: Simplify right side
   137,356.61x = 15,155,924,641.41
5. Step 5: Solve for x
   x = 15,155,924,641.41/137,356.61
6. Step 6: Final answer
   x = 110,339.98