Finding the Fourth Proportional to 91,959.38, 137,134.34 and 91,118.60

Step by Step Solution

1. Step 1: Write the proportion equation
   91,959.38 : 137,134.34 = 91,118.60 : x
2. Step 2: Convert to fraction form
   91,959.38/137,134.34 = 91,118.60/x
3. Step 3: Cross multiply
   91,959.38x = 137,134.34 × 91,118.60
4. Step 4: Simplify right side
   91,959.38x = 12,495,487,931.46
5. Step 5: Solve for x
   x = 12,495,487,931.46/91,959.38
6. Step 6: Final answer
   x = 135,880.52