Finding the Fourth Proportional to 90,401.65, 124,746.42 and 51,639.31

Step by Step Solution

1. Step 1: Write the proportion equation
   90,401.65 : 124,746.42 = 51,639.31 : x
2. Step 2: Convert to fraction form
   90,401.65/124,746.42 = 51,639.31/x
3. Step 3: Cross multiply
   90,401.65x = 124,746.42 × 51,639.31
4. Step 4: Simplify right side
   90,401.65x = 6,441,819,053.77
5. Step 5: Solve for x
   x = 6,441,819,053.77/90,401.65
6. Step 6: Final answer
   x = 71,257.76