Finding the Fourth Proportional to 78,982.08, 118,493.89 and 28,386.21

Step by Step Solution

1. Step 1: Write the proportion equation
   78,982.08 : 118,493.89 = 28,386.21 : x
2. Step 2: Convert to fraction form
   78,982.08/118,493.89 = 28,386.21/x
3. Step 3: Cross multiply
   78,982.08x = 118,493.89 × 28,386.21
4. Step 4: Simplify right side
   78,982.08x = 3,363,592,445.26
5. Step 5: Solve for x
   x = 3,363,592,445.26/78,982.08
6. Step 6: Final answer
   x = 42,586.78