Finding the Fourth Proportional to 2,520.86, 3,781.87 and 981.86

Step by Step Solution

1. Step 1: Write the proportion equation
   2,520.86 : 3,781.87 = 981.86 : x
2. Step 2: Convert to fraction form
   2,520.86/3,781.87 = 981.86/x
3. Step 3: Cross multiply
   2,520.86x = 3,781.87 × 981.86
4. Step 4: Simplify right side
   2,520.86x = 3,713,266.88
5. Step 5: Solve for x
   x = 3,713,266.88/2,520.86
6. Step 6: Final answer
   x = 1,473.02