Finding the Fourth Proportional to 1,395.96, 1,927.72 and 899.46

Step by Step Solution

1. Step 1: Write the proportion equation
   1,395.96 : 1,927.72 = 899.46 : x
2. Step 2: Convert to fraction form
   1,395.96/1,927.72 = 899.46/x
3. Step 3: Cross multiply
   1,395.96x = 1,927.72 × 899.46
4. Step 4: Simplify right side
   1,395.96x = 1,733,907.03
5. Step 5: Solve for x
   x = 1,733,907.03/1,395.96
6. Step 6: Final answer
   x = 1,242.09