Finding the Fourth Proportional to 68,143.59, 102,219.71 and 21,398.31

Step by Step Solution

1. Step 1: Write the proportion equation
   68,143.59 : 102,219.71 = 21,398.31 : x
2. Step 2: Convert to fraction form
   68,143.59/102,219.71 = 21,398.31/x
3. Step 3: Cross multiply
   68,143.59x = 102,219.71 × 21,398.31
4. Step 4: Simplify right side
   68,143.59x = 2,187,329,042.69
5. Step 5: Solve for x
   x = 2,187,329,042.69/68,143.59
6. Step 6: Final answer
   x = 32,098.82