Finding the Fourth Proportional to 2,151.68, 3,225.59 and 981.06

Step by Step Solution

1. Step 1: Write the proportion equation
   2,151.68 : 3,225.59 = 981.06 : x
2. Step 2: Convert to fraction form
   2,151.68/3,225.59 = 981.06/x
3. Step 3: Cross multiply
   2,151.68x = 3,225.59 × 981.06
4. Step 4: Simplify right side
   2,151.68x = 3,164,492.42
5. Step 5: Solve for x
   x = 3,164,492.42/2,151.68
6. Step 6: Final answer
   x = 1,470.71