Finding the Fourth Proportional to 2,345.12, 3,515.00 and 1,110.78

Step by Step Solution

1. Step 1: Write the proportion equation
   2,345.12 : 3,515.00 = 1,110.78 : x
2. Step 2: Convert to fraction form
   2,345.12/3,515.00 = 1,110.78/x
3. Step 3: Cross multiply
   2,345.12x = 3,515.00 × 1,110.78
4. Step 4: Simplify right side
   2,345.12x = 3,904,386.15
5. Step 5: Solve for x
   x = 3,904,386.15/2,345.12
6. Step 6: Final answer
   x = 1,664.90