Finding the Fourth Proportional to 1,607.96, 2,218.96 and 899.82

Step by Step Solution

1. Step 1: Write the proportion equation
   1,607.96 : 2,218.96 = 899.82 : x
2. Step 2: Convert to fraction form
   1,607.96/2,218.96 = 899.82/x
3. Step 3: Cross multiply
   1,607.96x = 2,218.96 × 899.82
4. Step 4: Simplify right side
   1,607.96x = 1,996,664.59
5. Step 5: Solve for x
   x = 1,996,664.59/1,607.96
6. Step 6: Final answer
   x = 1,241.74