Finding the Fourth Proportional to 1,003.34, 1,377.24 and 890.35

Step by Step Solution

1. Step 1: Write the proportion equation
   1,003.34 : 1,377.24 = 890.35 : x
2. Step 2: Convert to fraction form
   1,003.34/1,377.24 = 890.35/x
3. Step 3: Cross multiply
   1,003.34x = 1,377.24 × 890.35
4. Step 4: Simplify right side
   1,003.34x = 1,226,225.63
5. Step 5: Solve for x
   x = 1,226,225.63/1,003.34
6. Step 6: Final answer
   x = 1,222.14