Finding the Fourth Proportional to 1,733.84, 2,392.72 and 987.78

Step by Step Solution

1. Step 1: Write the proportion equation
   1,733.84 : 2,392.72 = 987.78 : x
2. Step 2: Convert to fraction form
   1,733.84/2,392.72 = 987.78/x
3. Step 3: Cross multiply
   1,733.84x = 2,392.72 × 987.78
4. Step 4: Simplify right side
   1,733.84x = 2,363,480.96
5. Step 5: Solve for x
   x = 2,363,480.96/1,733.84
6. Step 6: Final answer
   x = 1,363.15