Finding the Fourth Proportional to 3,128.59, 4,316.93 and 1,870.16

Step by Step Solution

1. Step 1: Write the proportion equation
   3,128.59 : 4,316.93 = 1,870.16 : x
2. Step 2: Convert to fraction form
   3,128.59/4,316.93 = 1,870.16/x
3. Step 3: Cross multiply
   3,128.59x = 4,316.93 × 1,870.16
4. Step 4: Simplify right side
   3,128.59x = 8,073,325.89
5. Step 5: Solve for x
   x = 8,073,325.89/3,128.59
6. Step 6: Final answer
   x = 2,580.50