Finding the Fourth Proportional to 92,671.86, 137,815.61 and 89,719.41

Step by Step Solution

1. Step 1: Write the proportion equation
   92,671.86 : 137,815.61 = 89,719.41 : x
2. Step 2: Convert to fraction form
   92,671.86/137,815.61 = 89,719.41/x
3. Step 3: Cross multiply
   92,671.86x = 137,815.61 × 89,719.41
4. Step 4: Simplify right side
   92,671.86x = 12,364,734,769.39
5. Step 5: Solve for x
   x = 12,364,734,769.39/92,671.86
6. Step 6: Final answer
   x = 133,424.91