Finding the Fourth Proportional to 139,642.43, 209,442.87 and 50,875.25

Step by Step Solution

1. Step 1: Write the proportion equation
   139,642.43 : 209,442.87 = 50,875.25 : x
2. Step 2: Convert to fraction form
   139,642.43/209,442.87 = 50,875.25/x
3. Step 3: Cross multiply
   139,642.43x = 209,442.87 × 50,875.25
4. Step 4: Simplify right side
   139,642.43x = 10,655,457,324.75
5. Step 5: Solve for x
   x = 10,655,457,324.75/139,642.43
6. Step 6: Final answer
   x = 76,305.30