Finding the Fourth Proportional to 10,003.88, 13,798.40 and 8,115.50

Step by Step Solution

1. Step 1: Write the proportion equation
   10,003.88 : 13,798.40 = 8,115.50 : x
2. Step 2: Convert to fraction form
   10,003.88/13,798.40 = 8,115.50/x
3. Step 3: Cross multiply
   10,003.88x = 13,798.40 × 8,115.50
4. Step 4: Simplify right side
   10,003.88x = 111,980,915.20
5. Step 5: Solve for x
   x = 111,980,915.20/10,003.88
6. Step 6: Final answer
   x = 11,193.75