Finding the Fourth Proportional to 1,810.15, 2,498.18 and 1,138.06

Step by Step Solution

1. Step 1: Write the proportion equation
   1,810.15 : 2,498.18 = 1,138.06 : x
2. Step 2: Convert to fraction form
   1,810.15/2,498.18 = 1,138.06/x
3. Step 3: Cross multiply
   1,810.15x = 2,498.18 × 1,138.06
4. Step 4: Simplify right side
   1,810.15x = 2,843,076.16
5. Step 5: Solve for x
   x = 2,843,076.16/1,810.15
6. Step 6: Final answer
   x = 1,570.63