Finding the Fourth Proportional to 78,644.16, 108,525.42 and 42,831.99

Step by Step Solution

1. Step 1: Write the proportion equation
   78,644.16 : 108,525.42 = 42,831.99 : x
2. Step 2: Convert to fraction form
   78,644.16/108,525.42 = 42,831.99/x
3. Step 3: Cross multiply
   78,644.16x = 108,525.42 × 42,831.99
4. Step 4: Simplify right side
   78,644.16x = 4,648,359,704.19
5. Step 5: Solve for x
   x = 4,648,359,704.19/78,644.16
6. Step 6: Final answer
   x = 59,106.23