Finding the Fourth Proportional to 90,003.87, 124,222.65 and 51,789.15

Step by Step Solution

1. Step 1: Write the proportion equation
   90,003.87 : 124,222.65 = 51,789.15 : x
2. Step 2: Convert to fraction form
   90,003.87/124,222.65 = 51,789.15/x
3. Step 3: Cross multiply
   90,003.87x = 124,222.65 × 51,789.15
4. Step 4: Simplify right side
   90,003.87x = 6,433,385,454.25
5. Step 5: Solve for x
   x = 6,433,385,454.25/90,003.87
6. Step 6: Final answer
   x = 71,478.99