Finding the Fourth Proportional to 1,396.55, 1,927.42 and 899.01

Step by Step Solution

1. Step 1: Write the proportion equation
   1,396.55 : 1,927.42 = 899.01 : x
2. Step 2: Convert to fraction form
   1,396.55/1,927.42 = 899.01/x
3. Step 3: Cross multiply
   1,396.55x = 1,927.42 × 899.01
4. Step 4: Simplify right side
   1,396.55x = 1,732,767.61
5. Step 5: Solve for x
   x = 1,732,767.61/1,396.55
6. Step 6: Final answer
   x = 1,240.75