Finding the Fourth Proportional to 2,328.72, 3,213.11 and 1,699.61

Step by Step Solution

1. Step 1: Write the proportion equation
   2,328.72 : 3,213.11 = 1,699.61 : x
2. Step 2: Convert to fraction form
   2,328.72/3,213.11 = 1,699.61/x
3. Step 3: Cross multiply
   2,328.72x = 3,213.11 × 1,699.61
4. Step 4: Simplify right side
   2,328.72x = 5,461,009.32
5. Step 5: Solve for x
   x = 5,461,009.32/2,328.72
6. Step 6: Final answer
   x = 2,345.07