Finding the Fourth Proportional to 78,870.48, 118,324.55 and 26,280.42

Step by Step Solution

1. Step 1: Write the proportion equation
   78,870.48 : 118,324.55 = 26,280.42 : x
2. Step 2: Convert to fraction form
   78,870.48/118,324.55 = 26,280.42/x
3. Step 3: Cross multiply
   78,870.48x = 118,324.55 × 26,280.42
4. Step 4: Simplify right side
   78,870.48x = 3,109,618,870.31
5. Step 5: Solve for x
   x = 3,109,618,870.31/78,870.48
6. Step 6: Final answer
   x = 39,426.90