Finding the Fourth Proportional to 91,178.29, 136,815.59 and 64,695.42

Step by Step Solution

1. Step 1: Write the proportion equation
   91,178.29 : 136,815.59 = 64,695.42 : x
2. Step 2: Convert to fraction form
   91,178.29/136,815.59 = 64,695.42/x
3. Step 3: Cross multiply
   91,178.29x = 136,815.59 × 64,695.42
4. Step 4: Simplify right side
   91,178.29x = 8,851,342,057.60
5. Step 5: Solve for x
   x = 8,851,342,057.60/91,178.29
6. Step 6: Final answer
   x = 97,077.30