Finding the Fourth Proportional to 65,258.17, 90,099.63 and 50,123.77

Step by Step Solution

1. Step 1: Write the proportion equation
   65,258.17 : 90,099.63 = 50,123.77 : x
2. Step 2: Convert to fraction form
   65,258.17/90,099.63 = 50,123.77/x
3. Step 3: Cross multiply
   65,258.17x = 90,099.63 × 50,123.77
4. Step 4: Simplify right side
   65,258.17x = 4,516,133,131.21
5. Step 5: Solve for x
   x = 4,516,133,131.21/65,258.17
6. Step 6: Final answer
   x = 69,204.10