Finding the Fourth Proportional to 1,340.78, 1,849.80 and 1,061.06

Step by Step Solution

1. Step 1: Write the proportion equation
   1,340.78 : 1,849.80 = 1,061.06 : x
2. Step 2: Convert to fraction form
   1,340.78/1,849.80 = 1,061.06/x
3. Step 3: Cross multiply
   1,340.78x = 1,849.80 × 1,061.06
4. Step 4: Simplify right side
   1,340.78x = 1,962,748.79
5. Step 5: Solve for x
   x = 1,962,748.79/1,340.78
6. Step 6: Final answer
   x = 1,463.89