Finding the Fourth Proportional to 3,128.76, 4,316.67 and 1,870.02

Step by Step Solution

1. Step 1: Write the proportion equation
   3,128.76 : 4,316.67 = 1,870.02 : x
2. Step 2: Convert to fraction form
   3,128.76/4,316.67 = 1,870.02/x
3. Step 3: Cross multiply
   3,128.76x = 4,316.67 × 1,870.02
4. Step 4: Simplify right side
   3,128.76x = 8,072,259.23
5. Step 5: Solve for x
   x = 8,072,259.23/3,128.76
6. Step 6: Final answer
   x = 2,580.02