Finding the Fourth Proportional to 2,543.38, 3,814.59 and 899.89

Step by Step Solution

1. Step 1: Write the proportion equation
   2,543.38 : 3,814.59 = 899.89 : x
2. Step 2: Convert to fraction form
   2,543.38/3,814.59 = 899.89/x
3. Step 3: Cross multiply
   2,543.38x = 3,814.59 × 899.89
4. Step 4: Simplify right side
   2,543.38x = 3,432,711.40
5. Step 5: Solve for x
   x = 3,432,711.40/2,543.38
6. Step 6: Final answer
   x = 1,349.67