Finding the Fourth Proportional to 1,374.84, 1,896.30 and 909.72

Step by Step Solution

1. Step 1: Write the proportion equation
   1,374.84 : 1,896.30 = 909.72 : x
2. Step 2: Convert to fraction form
   1,374.84/1,896.30 = 909.72/x
3. Step 3: Cross multiply
   1,374.84x = 1,896.30 × 909.72
4. Step 4: Simplify right side
   1,374.84x = 1,725,102.04
5. Step 5: Solve for x
   x = 1,725,102.04/1,374.84
6. Step 6: Final answer
   x = 1,254.77