Finding the Fourth Proportional to 1,164.78, 1,606.37 and 899.24

Step by Step Solution

1. Step 1: Write the proportion equation
   1,164.78 : 1,606.37 = 899.24 : x
2. Step 2: Convert to fraction form
   1,164.78/1,606.37 = 899.24/x
3. Step 3: Cross multiply
   1,164.78x = 1,606.37 × 899.24
4. Step 4: Simplify right side
   1,164.78x = 1,444,499.63
5. Step 5: Solve for x
   x = 1,444,499.63/1,164.78
6. Step 6: Final answer
   x = 1,240.15