Finding the Fourth Proportional to 78,446.15, 108,255.69 and 42,636.15

Step by Step Solution

1. Step 1: Write the proportion equation
   78,446.15 : 108,255.69 = 42,636.15 : x
2. Step 2: Convert to fraction form
   78,446.15/108,255.69 = 42,636.15/x
3. Step 3: Cross multiply
   78,446.15x = 108,255.69 × 42,636.15
4. Step 4: Simplify right side
   78,446.15x = 4,615,605,532.72
5. Step 5: Solve for x
   x = 4,615,605,532.72/78,446.15
6. Step 6: Final answer
   x = 58,837.89