Finding the Fourth Proportional to 1,348.86, 1,861.56 and 907.68

Step by Step Solution

1. Step 1: Write the proportion equation
   1,348.86 : 1,861.56 = 907.68 : x
2. Step 2: Convert to fraction form
   1,348.86/1,861.56 = 907.68/x
3. Step 3: Cross multiply
   1,348.86x = 1,861.56 × 907.68
4. Step 4: Simplify right side
   1,348.86x = 1,689,700.78
5. Step 5: Solve for x
   x = 1,689,700.78/1,348.86
6. Step 6: Final answer
   x = 1,252.69