Finding the Fourth Proportional to 91,436.76, 137,154.18 and 69,385.58

Step by Step Solution

1. Step 1: Write the proportion equation
   91,436.76 : 137,154.18 = 69,385.58 : x
2. Step 2: Convert to fraction form
   91,436.76/137,154.18 = 69,385.58/x
3. Step 3: Cross multiply
   91,436.76x = 137,154.18 × 69,385.58
4. Step 4: Simplify right side
   91,436.76x = 9,516,522,328.72
5. Step 5: Solve for x
   x = 9,516,522,328.72/91,436.76
6. Step 6: Final answer
   x = 104,077.64