Finding the Fourth Proportional to 1,870.50, 2,582.13 and 1,172.28

Step by Step Solution

1. Step 1: Write the proportion equation
   1,870.50 : 2,582.13 = 1,172.28 : x
2. Step 2: Convert to fraction form
   1,870.50/2,582.13 = 1,172.28/x
3. Step 3: Cross multiply
   1,870.50x = 2,582.13 × 1,172.28
4. Step 4: Simplify right side
   1,870.50x = 3,026,979.36
5. Step 5: Solve for x
   x = 3,026,979.36/1,870.50
6. Step 6: Final answer
   x = 1,618.27