Finding the Fourth Proportional to 2,160.47, 2,981.40 and 1,276.29

Step by Step Solution

1. Step 1: Write the proportion equation
   2,160.47 : 2,981.40 = 1,276.29 : x
2. Step 2: Convert to fraction form
   2,160.47/2,981.40 = 1,276.29/x
3. Step 3: Cross multiply
   2,160.47x = 2,981.40 × 1,276.29
4. Step 4: Simplify right side
   2,160.47x = 3,805,131.01
5. Step 5: Solve for x
   x = 3,805,131.01/2,160.47
6. Step 6: Final answer
   x = 1,761.25