Finding the Fourth Proportional to 8,915.90, 12,306.01 and 5,931.86

Step by Step Solution

1. Step 1: Write the proportion equation
   8,915.90 : 12,306.01 = 5,931.86 : x
2. Step 2: Convert to fraction form
   8,915.90/12,306.01 = 5,931.86/x
3. Step 3: Cross multiply
   8,915.90x = 12,306.01 × 5,931.86
4. Step 4: Simplify right side
   8,915.90x = 72,997,528.48
5. Step 5: Solve for x
   x = 72,997,528.48/8,915.90
6. Step 6: Final answer
   x = 8,187.34