Finding the Fourth Proportional to 78,445.87, 108,255.59 and 42,636.02

Step by Step Solution

1. Step 1: Write the proportion equation
   78,445.87 : 108,255.59 = 42,636.02 : x
2. Step 2: Convert to fraction form
   78,445.87/108,255.59 = 42,636.02/x
3. Step 3: Cross multiply
   78,445.87x = 108,255.59 × 42,636.02
4. Step 4: Simplify right side
   78,445.87x = 4,615,587,514.72
5. Step 5: Solve for x
   x = 4,615,587,514.72/78,445.87
6. Step 6: Final answer
   x = 58,837.87