Finding the Fourth Proportional to 1,870.52, 2,807.22 and 1,221.08

Step by Step Solution

1. Step 1: Write the proportion equation
   1,870.52 : 2,807.22 = 1,221.08 : x
2. Step 2: Convert to fraction form
   1,870.52/2,807.22 = 1,221.08/x
3. Step 3: Cross multiply
   1,870.52x = 2,807.22 × 1,221.08
4. Step 4: Simplify right side
   1,870.52x = 3,427,840.20
5. Step 5: Solve for x
   x = 3,427,840.20/1,870.52
6. Step 6: Final answer
   x = 1,832.56