Finding the Fourth Proportional to 1,664.72, 2,490.84 and 934.88

Step by Step Solution

1. Step 1: Write the proportion equation
   1,664.72 : 2,490.84 = 934.88 : x
2. Step 2: Convert to fraction form
   1,664.72/2,490.84 = 934.88/x
3. Step 3: Cross multiply
   1,664.72x = 2,490.84 × 934.88
4. Step 4: Simplify right side
   1,664.72x = 2,328,636.50
5. Step 5: Solve for x
   x = 2,328,636.50/1,664.72
6. Step 6: Final answer
   x = 1,398.82