Finding the Fourth Proportional to 20,981.52, 31,442.79 and 17,849.15

Step by Step Solution

1. Step 1: Write the proportion equation
   20,981.52 : 31,442.79 = 17,849.15 : x
2. Step 2: Convert to fraction form
   20,981.52/31,442.79 = 17,849.15/x
3. Step 3: Cross multiply
   20,981.52x = 31,442.79 × 17,849.15
4. Step 4: Simplify right side
   20,981.52x = 561,226,970.69
5. Step 5: Solve for x
   x = 561,226,970.69/20,981.52
6. Step 6: Final answer
   x = 26,748.63