Finding the Fourth Proportional to 1,369.30, 1,890.12 and 845.50

Step by Step Solution

1. Step 1: Write the proportion equation
   1,369.30 : 1,890.12 = 845.50 : x
2. Step 2: Convert to fraction form
   1,369.30/1,890.12 = 845.50/x
3. Step 3: Cross multiply
   1,369.30x = 1,890.12 × 845.50
4. Step 4: Simplify right side
   1,369.30x = 1,598,096.46
5. Step 5: Solve for x
   x = 1,598,096.46/1,369.30
6. Step 6: Final answer
   x = 1,167.09