Finding the Fourth Proportional to 2,567.51, 3,543.15 and 1,388.58

Step by Step Solution

1. Step 1: Write the proportion equation
   2,567.51 : 3,543.15 = 1,388.58 : x
2. Step 2: Convert to fraction form
   2,567.51/3,543.15 = 1,388.58/x
3. Step 3: Cross multiply
   2,567.51x = 3,543.15 × 1,388.58
4. Step 4: Simplify right side
   2,567.51x = 4,919,947.23
5. Step 5: Solve for x
   x = 4,919,947.23/2,567.51
6. Step 6: Final answer
   x = 1,916.23