Finding the Fourth Proportional to 1,665.58, 2,498.72 and 625.56

Step by Step Solution

1. Step 1: Write the proportion equation
   1,665.58 : 2,498.72 = 625.56 : x
2. Step 2: Convert to fraction form
   1,665.58/2,498.72 = 625.56/x
3. Step 3: Cross multiply
   1,665.58x = 2,498.72 × 625.56
4. Step 4: Simplify right side
   1,665.58x = 1,563,099.28
5. Step 5: Solve for x
   x = 1,563,099.28/1,665.58
6. Step 6: Final answer
   x = 938.47