Finding the Fourth Proportional to 1,651.89, 2,478.18 and 557.03

Step by Step Solution

1. Step 1: Write the proportion equation
   1,651.89 : 2,478.18 = 557.03 : x
2. Step 2: Convert to fraction form
   1,651.89/2,478.18 = 557.03/x
3. Step 3: Cross multiply
   1,651.89x = 2,478.18 × 557.03
4. Step 4: Simplify right side
   1,651.89x = 1,380,411.82
5. Step 5: Solve for x
   x = 1,380,411.82/1,651.89
6. Step 6: Final answer
   x = 835.65