Finding the Fourth Proportional to 78,698.78, 108,601.14 and 42,888.02

Step by Step Solution

1. Step 1: Write the proportion equation
   78,698.78 : 108,601.14 = 42,888.02 : x
2. Step 2: Convert to fraction form
   78,698.78/108,601.14 = 42,888.02/x
3. Step 3: Cross multiply
   78,698.78x = 108,601.14 × 42,888.02
4. Step 4: Simplify right side
   78,698.78x = 4,657,687,321.34
5. Step 5: Solve for x
   x = 4,657,687,321.34/78,698.78
6. Step 6: Final answer
   x = 59,183.73