Finding the Fourth Proportional to 98,662.42, 136,064.82 and 64,658.71

Step by Step Solution

1. Step 1: Write the proportion equation
   98,662.42 : 136,064.82 = 64,658.71 : x
2. Step 2: Convert to fraction form
   98,662.42/136,064.82 = 64,658.71/x
3. Step 3: Cross multiply
   98,662.42x = 136,064.82 × 64,658.71
4. Step 4: Simplify right side
   98,662.42x = 8,797,775,737.58
5. Step 5: Solve for x
   x = 8,797,775,737.58/98,662.42
6. Step 6: Final answer
   x = 89,170.48