Finding the Fourth Proportional to 42,972.52, 64,456.16 and 25,553.20

Step by Step Solution

1. Step 1: Write the proportion equation
   42,972.52 : 64,456.16 = 25,553.20 : x
2. Step 2: Convert to fraction form
   42,972.52/64,456.16 = 25,553.20/x
3. Step 3: Cross multiply
   42,972.52x = 64,456.16 × 25,553.20
4. Step 4: Simplify right side
   42,972.52x = 1,647,061,147.71
5. Step 5: Solve for x
   x = 1,647,061,147.71/42,972.52
6. Step 6: Final answer
   x = 38,328.24