Finding the Fourth Proportional to 78,454.78, 108,263.10 and 42,644.50

Step by Step Solution

1. Step 1: Write the proportion equation
   78,454.78 : 108,263.10 = 42,644.50 : x
2. Step 2: Convert to fraction form
   78,454.78/108,263.10 = 42,644.50/x
3. Step 3: Cross multiply
   78,454.78x = 108,263.10 × 42,644.50
4. Step 4: Simplify right side
   78,454.78x = 4,616,825,767.95
5. Step 5: Solve for x
   x = 4,616,825,767.95/78,454.78
6. Step 6: Final answer
   x = 58,846.97