Finding the Fourth Proportional to 22,080.06, 30,468.95 and 13,128.30

Step by Step Solution

1. Step 1: Write the proportion equation
   22,080.06 : 30,468.95 = 13,128.30 : x
2. Step 2: Convert to fraction form
   22,080.06/30,468.95 = 13,128.30/x
3. Step 3: Cross multiply
   22,080.06x = 30,468.95 × 13,128.30
4. Step 4: Simplify right side
   22,080.06x = 400,005,516.29
5. Step 5: Solve for x
   x = 400,005,516.29/22,080.06
6. Step 6: Final answer
   x = 18,116.14