Finding the Fourth Proportional to 25,356.78, 34,980.56 and 16,407.17

Step by Step Solution

1. Step 1: Write the proportion equation
   25,356.78 : 34,980.56 = 16,407.17 : x
2. Step 2: Convert to fraction form
   25,356.78/34,980.56 = 16,407.17/x
3. Step 3: Cross multiply
   25,356.78x = 34,980.56 × 16,407.17
4. Step 4: Simplify right side
   25,356.78x = 573,931,819.71
5. Step 5: Solve for x
   x = 573,931,819.71/25,356.78
6. Step 6: Final answer
   x = 22,634.26