Finding the Fourth Proportional to 3,128.88, 4,316.82 and 1,802.10

Step by Step Solution

1. Step 1: Write the proportion equation
   3,128.88 : 4,316.82 = 1,802.10 : x
2. Step 2: Convert to fraction form
   3,128.88/4,316.82 = 1,802.10/x
3. Step 3: Cross multiply
   3,128.88x = 4,316.82 × 1,802.10
4. Step 4: Simplify right side
   3,128.88x = 7,779,341.32
5. Step 5: Solve for x
   x = 7,779,341.32/3,128.88
6. Step 6: Final answer
   x = 2,486.30