Finding the Fourth Proportional to 78,641.51, 108,526.52 and 42,831.50

Step by Step Solution

1. Step 1: Write the proportion equation
   78,641.51 : 108,526.52 = 42,831.50 : x
2. Step 2: Convert to fraction form
   78,641.51/108,526.52 = 42,831.50/x
3. Step 3: Cross multiply
   78,641.51x = 108,526.52 × 42,831.50
4. Step 4: Simplify right side
   78,641.51x = 4,648,354,019.78
5. Step 5: Solve for x
   x = 4,648,354,019.78/78,641.51
6. Step 6: Final answer
   x = 59,108.15