Finding the Fourth Proportional to 1,340.34, 2,009.89 and 560.71

Step by Step Solution

1. Step 1: Write the proportion equation
   1,340.34 : 2,009.89 = 560.71 : x
2. Step 2: Convert to fraction form
   1,340.34/2,009.89 = 560.71/x
3. Step 3: Cross multiply
   1,340.34x = 2,009.89 × 560.71
4. Step 4: Simplify right side
   1,340.34x = 1,126,965.42
5. Step 5: Solve for x
   x = 1,126,965.42/1,340.34
6. Step 6: Final answer
   x = 840.81