Finding the Fourth Proportional to 11,100.95, 15,321.45 and 7,127.09

Step by Step Solution

1. Step 1: Write the proportion equation
   11,100.95 : 15,321.45 = 7,127.09 : x
2. Step 2: Convert to fraction form
   11,100.95/15,321.45 = 7,127.09/x
3. Step 3: Cross multiply
   11,100.95x = 15,321.45 × 7,127.09
4. Step 4: Simplify right side
   11,100.95x = 109,197,276.47
5. Step 5: Solve for x
   x = 109,197,276.47/11,100.95
6. Step 6: Final answer
   x = 9,836.76