Finding the Fourth Proportional to 1,780.24, 2,454.51 and 1,115.93

Step by Step Solution

1. Step 1: Write the proportion equation
   1,780.24 : 2,454.51 = 1,115.93 : x
2. Step 2: Convert to fraction form
   1,780.24/2,454.51 = 1,115.93/x
3. Step 3: Cross multiply
   1,780.24x = 2,454.51 × 1,115.93
4. Step 4: Simplify right side
   1,780.24x = 2,739,061.34
5. Step 5: Solve for x
   x = 2,739,061.34/1,780.24
6. Step 6: Final answer
   x = 1,538.59