Finding the Fourth Proportional to 1,858.04, 2,563.94 and 1,018.72

Step by Step Solution

1. Step 1: Write the proportion equation
   1,858.04 : 2,563.94 = 1,018.72 : x
2. Step 2: Convert to fraction form
   1,858.04/2,563.94 = 1,018.72/x
3. Step 3: Cross multiply
   1,858.04x = 2,563.94 × 1,018.72
4. Step 4: Simplify right side
   1,858.04x = 2,611,931.86
5. Step 5: Solve for x
   x = 2,611,931.86/1,858.04
6. Step 6: Final answer
   x = 1,405.75