Finding the Fourth Proportional to 1,931.72, 2,872.73 and 1,870.21

Step by Step Solution

1. Step 1: Write the proportion equation
   1,931.72 : 2,872.73 = 1,870.21 : x
2. Step 2: Convert to fraction form
   1,931.72/2,872.73 = 1,870.21/x
3. Step 3: Cross multiply
   1,931.72x = 2,872.73 × 1,870.21
4. Step 4: Simplify right side
   1,931.72x = 5,372,608.37
5. Step 5: Solve for x
   x = 5,372,608.37/1,931.72
6. Step 6: Final answer
   x = 2,781.26