Finding the Fourth Proportional to 84,391.50, 126,521.54 and 42,249.87

Step by Step Solution

1. Step 1: Write the proportion equation
   84,391.50 : 126,521.54 = 42,249.87 : x
2. Step 2: Convert to fraction form
   84,391.50/126,521.54 = 42,249.87/x
3. Step 3: Cross multiply
   84,391.50x = 126,521.54 × 42,249.87
4. Step 4: Simplify right side
   84,391.50x = 5,345,518,802.04
5. Step 5: Solve for x
   x = 5,345,518,802.04/84,391.50
6. Step 6: Final answer
   x = 63,341.91