Finding the Fourth Proportional to 2,430.83, 3,645.27 and 870.30

Step by Step Solution

1. Step 1: Write the proportion equation
   2,430.83 : 3,645.27 = 870.30 : x
2. Step 2: Convert to fraction form
   2,430.83/3,645.27 = 870.30/x
3. Step 3: Cross multiply
   2,430.83x = 3,645.27 × 870.30
4. Step 4: Simplify right side
   2,430.83x = 3,172,478.48
5. Step 5: Solve for x
   x = 3,172,478.48/2,430.83
6. Step 6: Final answer
   x = 1,305.10