Finding the Fourth Proportional to 1,555.10, 2,144.63 and 1,030.22

Step by Step Solution

1. Step 1: Write the proportion equation
   1,555.10 : 2,144.63 = 1,030.22 : x
2. Step 2: Convert to fraction form
   1,555.10/2,144.63 = 1,030.22/x
3. Step 3: Cross multiply
   1,555.10x = 2,144.63 × 1,030.22
4. Step 4: Simplify right side
   1,555.10x = 2,209,434.82
5. Step 5: Solve for x
   x = 2,209,434.82/1,555.10
6. Step 6: Final answer
   x = 1,420.77