Finding the Fourth Proportional to 68,148.69, 102,239.51 and 21,401.57

Step by Step Solution

1. Step 1: Write the proportion equation
   68,148.69 : 102,239.51 = 21,401.57 : x
2. Step 2: Convert to fraction form
   68,148.69/102,239.51 = 21,401.57/x
3. Step 3: Cross multiply
   68,148.69x = 102,239.51 × 21,401.57
4. Step 4: Simplify right side
   68,148.69x = 2,188,085,411.83
5. Step 5: Solve for x
   x = 2,188,085,411.83/68,148.69
6. Step 6: Final answer
   x = 32,107.52