Finding the Fourth Proportional to 13,092.40, 18,067.92 and 7,123.72

Step by Step Solution

1. Step 1: Write the proportion equation
   13,092.40 : 18,067.92 = 7,123.72 : x
2. Step 2: Convert to fraction form
   13,092.40/18,067.92 = 7,123.72/x
3. Step 3: Cross multiply
   13,092.40x = 18,067.92 × 7,123.72
4. Step 4: Simplify right side
   13,092.40x = 128,710,803.06
5. Step 5: Solve for x
   x = 128,710,803.06/13,092.40
6. Step 6: Final answer
   x = 9,830.96