Finding the Fourth Proportional to 1,604.70, 2,405.85 and 875.10

Step by Step Solution

1. Step 1: Write the proportion equation
   1,604.70 : 2,405.85 = 875.10 : x
2. Step 2: Convert to fraction form
   1,604.70/2,405.85 = 875.10/x
3. Step 3: Cross multiply
   1,604.70x = 2,405.85 × 875.10
4. Step 4: Simplify right side
   1,604.70x = 2,105,359.34
5. Step 5: Solve for x
   x = 2,105,359.34/1,604.70
6. Step 6: Final answer
   x = 1,312.00