Finding the Fourth Proportional to 78,422.36, 108,223.20 and 42,612.52

Step by Step Solution

1. Step 1: Write the proportion equation
   78,422.36 : 108,223.20 = 42,612.52 : x
2. Step 2: Convert to fraction form
   78,422.36/108,223.20 = 42,612.52/x
3. Step 3: Cross multiply
   78,422.36x = 108,223.20 × 42,612.52
4. Step 4: Simplify right side
   78,422.36x = 4,611,663,003.91
5. Step 5: Solve for x
   x = 4,611,663,003.91/78,422.36
6. Step 6: Final answer
   x = 58,805.46