Finding the Fourth Proportional to 1,372.38, 1,892.98 and 900.71

Step by Step Solution

1. Step 1: Write the proportion equation
   1,372.38 : 1,892.98 = 900.71 : x
2. Step 2: Convert to fraction form
   1,372.38/1,892.98 = 900.71/x
3. Step 3: Cross multiply
   1,372.38x = 1,892.98 × 900.71
4. Step 4: Simplify right side
   1,372.38x = 1,705,026.02
5. Step 5: Solve for x
   x = 1,705,026.02/1,372.38
6. Step 6: Final answer
   x = 1,242.39