Finding the Fourth Proportional to 1,493.80, 2,061.42 and 864.34

Step by Step Solution

1. Step 1: Write the proportion equation
   1,493.80 : 2,061.42 = 864.34 : x
2. Step 2: Convert to fraction form
   1,493.80/2,061.42 = 864.34/x
3. Step 3: Cross multiply
   1,493.80x = 2,061.42 × 864.34
4. Step 4: Simplify right side
   1,493.80x = 1,781,767.76
5. Step 5: Solve for x
   x = 1,781,767.76/1,493.80
6. Step 6: Final answer
   x = 1,192.78