Finding the Fourth Proportional to 78,788.26, 108,729.24 and 42,979.54

Step by Step Solution

1. Step 1: Write the proportion equation
   78,788.26 : 108,729.24 = 42,979.54 : x
2. Step 2: Convert to fraction form
   78,788.26/108,729.24 = 42,979.54/x
3. Step 3: Cross multiply
   78,788.26x = 108,729.24 × 42,979.54
4. Step 4: Simplify right side
   78,788.26x = 4,673,132,719.75
5. Step 5: Solve for x
   x = 4,673,132,719.75/78,788.26
6. Step 6: Final answer
   x = 59,312.55