Finding the Fourth Proportional to 1,562.90, 2,156.74 and 899.96

Step by Step Solution

1. Step 1: Write the proportion equation
   1,562.90 : 2,156.74 = 899.96 : x
2. Step 2: Convert to fraction form
   1,562.90/2,156.74 = 899.96/x
3. Step 3: Cross multiply
   1,562.90x = 2,156.74 × 899.96
4. Step 4: Simplify right side
   1,562.90x = 1,940,974.78
5. Step 5: Solve for x
   x = 1,940,974.78/1,562.90
6. Step 6: Final answer
   x = 1,241.91