Finding the Fourth Proportional to 1,924.72, 2,655.72 and 1,138.36

Step by Step Solution

1. Step 1: Write the proportion equation
   1,924.72 : 2,655.72 = 1,138.36 : x
2. Step 2: Convert to fraction form
   1,924.72/2,655.72 = 1,138.36/x
3. Step 3: Cross multiply
   1,924.72x = 2,655.72 × 1,138.36
4. Step 4: Simplify right side
   1,924.72x = 3,023,165.42
5. Step 5: Solve for x
   x = 3,023,165.42/1,924.72
6. Step 6: Final answer
   x = 1,570.70