Finding the Fourth Proportional to 22,456.31, 30,988.99 and 12,385.18

Step by Step Solution

1. Step 1: Write the proportion equation
   22,456.31 : 30,988.99 = 12,385.18 : x
2. Step 2: Convert to fraction form
   22,456.31/30,988.99 = 12,385.18/x
3. Step 3: Cross multiply
   22,456.31x = 30,988.99 × 12,385.18
4. Step 4: Simplify right side
   22,456.31x = 383,804,219.17
5. Step 5: Solve for x
   x = 383,804,219.17/22,456.31
6. Step 6: Final answer
   x = 17,091.15