Finding the Fourth Proportional to 1,870.16, 2,579.12 and 1,621.36

Step by Step Solution

1. Step 1: Write the proportion equation
   1,870.16 : 2,579.12 = 1,621.36 : x
2. Step 2: Convert to fraction form
   1,870.16/2,579.12 = 1,621.36/x
3. Step 3: Cross multiply
   1,870.16x = 2,579.12 × 1,621.36
4. Step 4: Simplify right side
   1,870.16x = 4,181,682.00
5. Step 5: Solve for x
   x = 4,181,682.00/1,870.16
6. Step 6: Final answer
   x = 2,236.00