Finding the Fourth Proportional to 112,658.69, 155,476.51 and 64,915.13

Step by Step Solution

1. Step 1: Write the proportion equation
   112,658.69 : 155,476.51 = 64,915.13 : x
2. Step 2: Convert to fraction form
   112,658.69/155,476.51 = 64,915.13/x
3. Step 3: Cross multiply
   112,658.69x = 155,476.51 × 64,915.13
4. Step 4: Simplify right side
   112,658.69x = 10,092,777,858.60
5. Step 5: Solve for x
   x = 10,092,777,858.60/112,658.69
6. Step 6: Final answer
   x = 89,587.21