Finding the Fourth Proportional to 1,562.86, 2,157.17 and 899.81

Step by Step Solution

1. Step 1: Write the proportion equation
   1,562.86 : 2,157.17 = 899.81 : x
2. Step 2: Convert to fraction form
   1,562.86/2,157.17 = 899.81/x
3. Step 3: Cross multiply
   1,562.86x = 2,157.17 × 899.81
4. Step 4: Simplify right side
   1,562.86x = 1,941,044.03
5. Step 5: Solve for x
   x = 1,941,044.03/1,562.86
6. Step 6: Final answer
   x = 1,241.98