Finding the Fourth Proportional to 1,778.57, 2,453.12 and 1,542.09

Step by Step Solution

1. Step 1: Write the proportion equation
   1,778.57 : 2,453.12 = 1,542.09 : x
2. Step 2: Convert to fraction form
   1,778.57/2,453.12 = 1,542.09/x
3. Step 3: Cross multiply
   1,778.57x = 2,453.12 × 1,542.09
4. Step 4: Simplify right side
   1,778.57x = 3,782,931.82
5. Step 5: Solve for x
   x = 3,782,931.82/1,778.57
6. Step 6: Final answer
   x = 2,126.96