Finding the Fourth Proportional to 1,872.72, 2,810.16 and 899.52

Step by Step Solution

1. Step 1: Write the proportion equation
   1,872.72 : 2,810.16 = 899.52 : x
2. Step 2: Convert to fraction form
   1,872.72/2,810.16 = 899.52/x
3. Step 3: Cross multiply
   1,872.72x = 2,810.16 × 899.52
4. Step 4: Simplify right side
   1,872.72x = 2,527,795.12
5. Step 5: Solve for x
   x = 2,527,795.12/1,872.72
6. Step 6: Final answer
   x = 1,349.80