Finding the Fourth Proportional to 1,866.17, 2,578.56 and 1,534.34

Step by Step Solution

1. Step 1: Write the proportion equation
   1,866.17 : 2,578.56 = 1,534.34 : x
2. Step 2: Convert to fraction form
   1,866.17/2,578.56 = 1,534.34/x
3. Step 3: Cross multiply
   1,866.17x = 2,578.56 × 1,534.34
4. Step 4: Simplify right side
   1,866.17x = 3,956,387.75
5. Step 5: Solve for x
   x = 3,956,387.75/1,866.17
6. Step 6: Final answer
   x = 2,120.06