Finding the Fourth Proportional to 1,376.34, 1,898.58 and 904.31

Step by Step Solution

1. Step 1: Write the proportion equation
   1,376.34 : 1,898.58 = 904.31 : x
2. Step 2: Convert to fraction form
   1,376.34/1,898.58 = 904.31/x
3. Step 3: Cross multiply
   1,376.34x = 1,898.58 × 904.31
4. Step 4: Simplify right side
   1,376.34x = 1,716,904.88
5. Step 5: Solve for x
   x = 1,716,904.88/1,376.34
6. Step 6: Final answer
   x = 1,247.44