Finding the Fourth Proportional to 65,258.31, 90,099.83 and 50,123.88

Step by Step Solution

1. Step 1: Write the proportion equation
   65,258.31 : 90,099.83 = 50,123.88 : x
2. Step 2: Convert to fraction form
   65,258.31/90,099.83 = 50,123.88/x
3. Step 3: Cross multiply
   65,258.31x = 90,099.83 × 50,123.88
4. Step 4: Simplify right side
   65,258.31x = 4,516,152,816.32
5. Step 5: Solve for x
   x = 4,516,152,816.32/65,258.31
6. Step 6: Final answer
   x = 69,204.26