Finding the Fourth Proportional to 1,349.29, 1,861.95 and 907.12

Step by Step Solution

1. Step 1: Write the proportion equation
   1,349.29 : 1,861.95 = 907.12 : x
2. Step 2: Convert to fraction form
   1,349.29/1,861.95 = 907.12/x
3. Step 3: Cross multiply
   1,349.29x = 1,861.95 × 907.12
4. Step 4: Simplify right side
   1,349.29x = 1,689,010.83
5. Step 5: Solve for x
   x = 1,689,010.83/1,349.29
6. Step 6: Final answer
   x = 1,251.78