Finding the Fourth Proportional to 1,418.99, 1,959.10 and 971.61

Step by Step Solution

1. Step 1: Write the proportion equation
   1,418.99 : 1,959.10 = 971.61 : x
2. Step 2: Convert to fraction form
   1,418.99/1,959.10 = 971.61/x
3. Step 3: Cross multiply
   1,418.99x = 1,959.10 × 971.61
4. Step 4: Simplify right side
   1,418.99x = 1,903,475.47
5. Step 5: Solve for x
   x = 1,903,475.47/1,418.99
6. Step 6: Final answer
   x = 1,341.43