Finding the Fourth Proportional to 78,445.59, 108,255.87 and 42,636.12

Step by Step Solution

1. Step 1: Write the proportion equation
   78,445.59 : 108,255.87 = 42,636.12 : x
2. Step 2: Convert to fraction form
   78,445.59/108,255.87 = 42,636.12/x
3. Step 3: Cross multiply
   78,445.59x = 108,255.87 × 42,636.12
4. Step 4: Simplify right side
   78,445.59x = 4,615,610,264.02
5. Step 5: Solve for x
   x = 4,615,610,264.02/78,445.59
6. Step 6: Final answer
   x = 58,838.37