Finding the Fourth Proportional to 1,400.04, 1,931.76 and 876.78

Step by Step Solution

1. Step 1: Write the proportion equation
   1,400.04 : 1,931.76 = 876.78 : x
2. Step 2: Convert to fraction form
   1,400.04/1,931.76 = 876.78/x
3. Step 3: Cross multiply
   1,400.04x = 1,931.76 × 876.78
4. Step 4: Simplify right side
   1,400.04x = 1,693,728.53
5. Step 5: Solve for x
   x = 1,693,728.53/1,400.04
6. Step 6: Final answer
   x = 1,209.77