Finding the Fourth Proportional to 1,362.16, 1,878.69 and 890.02

Step by Step Solution

1. Step 1: Write the proportion equation
   1,362.16 : 1,878.69 = 890.02 : x
2. Step 2: Convert to fraction form
   1,362.16/1,878.69 = 890.02/x
3. Step 3: Cross multiply
   1,362.16x = 1,878.69 × 890.02
4. Step 4: Simplify right side
   1,362.16x = 1,672,071.67
5. Step 5: Solve for x
   x = 1,672,071.67/1,362.16
6. Step 6: Final answer
   x = 1,227.51