Finding the Fourth Proportional to 78,521.23, 108,358.18 and 42,711.49

Step by Step Solution

1. Step 1: Write the proportion equation
   78,521.23 : 108,358.18 = 42,711.49 : x
2. Step 2: Convert to fraction form
   78,521.23/108,358.18 = 42,711.49/x
3. Step 3: Cross multiply
   78,521.23x = 108,358.18 × 42,711.49
4. Step 4: Simplify right side
   78,521.23x = 4,628,139,321.49
5. Step 5: Solve for x
   x = 4,628,139,321.49/78,521.23
6. Step 6: Final answer
   x = 58,941.25