Finding the Fourth Proportional to 83,672.78, 115,468.18 and 50,138.78

Step by Step Solution

1. Step 1: Write the proportion equation
   83,672.78 : 115,468.18 = 50,138.78 : x
2. Step 2: Convert to fraction form
   83,672.78/115,468.18 = 50,138.78/x
3. Step 3: Cross multiply
   83,672.78x = 115,468.18 × 50,138.78
4. Step 4: Simplify right side
   83,672.78x = 5,789,433,674.02
5. Step 5: Solve for x
   x = 5,789,433,674.02/83,672.78
6. Step 6: Final answer
   x = 69,191.36