Finding the Fourth Proportional to 25,436.02, 38,140.71 and 10,642.18

Step by Step Solution

1. Step 1: Write the proportion equation
   25,436.02 : 38,140.71 = 10,642.18 : x
2. Step 2: Convert to fraction form
   25,436.02/38,140.71 = 10,642.18/x
3. Step 3: Cross multiply
   25,436.02x = 38,140.71 × 10,642.18
4. Step 4: Simplify right side
   25,436.02x = 405,900,301.15
5. Step 5: Solve for x
   x = 405,900,301.15/25,436.02
6. Step 6: Final answer
   x = 15,957.70