Finding the Fourth Proportional to 11,877.34, 16,403.70 and 7,915.27

Step by Step Solution

1. Step 1: Write the proportion equation
   11,877.34 : 16,403.70 = 7,915.27 : x
2. Step 2: Convert to fraction form
   11,877.34/16,403.70 = 7,915.27/x
3. Step 3: Cross multiply
   11,877.34x = 16,403.70 × 7,915.27
4. Step 4: Simplify right side
   11,877.34x = 129,839,714.50
5. Step 5: Solve for x
   x = 129,839,714.50/11,877.34
6. Step 6: Final answer
   x = 10,931.72