Finding the Fourth Proportional to 90,507.50, 124,900.56 and 50,221.37

Step by Step Solution

1. Step 1: Write the proportion equation
   90,507.50 : 124,900.56 = 50,221.37 : x
2. Step 2: Convert to fraction form
   90,507.50/124,900.56 = 50,221.37/x
3. Step 3: Cross multiply
   90,507.50x = 124,900.56 × 50,221.37
4. Step 4: Simplify right side
   90,507.50x = 6,272,676,705.41
5. Step 5: Solve for x
   x = 6,272,676,705.41/90,507.50
6. Step 6: Final answer
   x = 69,305.60