Finding the Fourth Proportional to 2,775.18, 4,164.12 and 1,312.59

Step by Step Solution

1. Step 1: Write the proportion equation
   2,775.18 : 4,164.12 = 1,312.59 : x
2. Step 2: Convert to fraction form
   2,775.18/4,164.12 = 1,312.59/x
3. Step 3: Cross multiply
   2,775.18x = 4,164.12 × 1,312.59
4. Step 4: Simplify right side
   2,775.18x = 5,465,782.27
5. Step 5: Solve for x
   x = 5,465,782.27/2,775.18
6. Step 6: Final answer
   x = 1,969.52