Finding the Fourth Proportional to 13,290.32, 19,941.24 and 7,127.12

Step by Step Solution

1. Step 1: Write the proportion equation
   13,290.32 : 19,941.24 = 7,127.12 : x
2. Step 2: Convert to fraction form
   13,290.32/19,941.24 = 7,127.12/x
3. Step 3: Cross multiply
   13,290.32x = 19,941.24 × 7,127.12
4. Step 4: Simplify right side
   13,290.32x = 142,123,610.43
5. Step 5: Solve for x
   x = 142,123,610.43/13,290.32
6. Step 6: Final answer
   x = 10,693.77