Finding the Fourth Proportional to 10,123.29, 13,987.27 and 7,285.05

Step by Step Solution

1. Step 1: Write the proportion equation
   10,123.29 : 13,987.27 = 7,285.05 : x
2. Step 2: Convert to fraction form
   10,123.29/13,987.27 = 7,285.05/x
3. Step 3: Cross multiply
   10,123.29x = 13,987.27 × 7,285.05
4. Step 4: Simplify right side
   10,123.29x = 101,897,854.95
5. Step 5: Solve for x
   x = 101,897,854.95/10,123.29
6. Step 6: Final answer
   x = 10,065.69