Finding the Fourth Proportional to 138,948.72, 208,380.52 and 50,191.28

Step by Step Solution

1. Step 1: Write the proportion equation
   138,948.72 : 208,380.52 = 50,191.28 : x
2. Step 2: Convert to fraction form
   138,948.72/208,380.52 = 50,191.28/x
3. Step 3: Cross multiply
   138,948.72x = 208,380.52 × 50,191.28
4. Step 4: Simplify right side
   138,948.72x = 10,458,885,025.87
5. Step 5: Solve for x
   x = 10,458,885,025.87/138,948.72
6. Step 6: Final answer
   x = 75,271.55