Finding the Fourth Proportional to 42,172.32, 63,209.76 and 15,860.28

Step by Step Solution

1. Step 1: Write the proportion equation
   42,172.32 : 63,209.76 = 15,860.28 : x
2. Step 2: Convert to fraction form
   42,172.32/63,209.76 = 15,860.28/x
3. Step 3: Cross multiply
   42,172.32x = 63,209.76 × 15,860.28
4. Step 4: Simplify right side
   42,172.32x = 1,002,524,492.33
5. Step 5: Solve for x
   x = 1,002,524,492.33/42,172.32
6. Step 6: Final answer
   x = 23,772.10