Finding the Fourth Proportional to 1,858.37, 2,564.44 and 1,061.78

Step by Step Solution

1. Step 1: Write the proportion equation
   1,858.37 : 2,564.44 = 1,061.78 : x
2. Step 2: Convert to fraction form
   1,858.37/2,564.44 = 1,061.78/x
3. Step 3: Cross multiply
   1,858.37x = 2,564.44 × 1,061.78
4. Step 4: Simplify right side
   1,858.37x = 2,722,871.10
5. Step 5: Solve for x
   x = 2,722,871.10/1,858.37
6. Step 6: Final answer
   x = 1,465.19