Finding the Fourth Proportional to 78,613.48, 108,551.91 and 72,915.16

Step by Step Solution

1. Step 1: Write the proportion equation
   78,613.48 : 108,551.91 = 72,915.16 : x
2. Step 2: Convert to fraction form
   78,613.48/108,551.91 = 72,915.16/x
3. Step 3: Cross multiply
   78,613.48x = 108,551.91 × 72,915.16
4. Step 4: Simplify right side
   78,613.48x = 7,915,079,885.96
5. Step 5: Solve for x
   x = 7,915,079,885.96/78,613.48
6. Step 6: Final answer
   x = 100,683.49