Finding the Fourth Proportional to 2,981.12, 4,111.36 and 1,932.80

Step by Step Solution

1. Step 1: Write the proportion equation
   2,981.12 : 4,111.36 = 1,932.80 : x
2. Step 2: Convert to fraction form
   2,981.12/4,111.36 = 1,932.80/x
3. Step 3: Cross multiply
   2,981.12x = 4,111.36 × 1,932.80
4. Step 4: Simplify right side
   2,981.12x = 7,946,436.61
5. Step 5: Solve for x
   x = 7,946,436.61/2,981.12
6. Step 6: Final answer
   x = 2,665.59