Finding the Fourth Proportional to 1,502.31, 2,072.14 and 1,378.38

Step by Step Solution

1. Step 1: Write the proportion equation
   1,502.31 : 2,072.14 = 1,378.38 : x
2. Step 2: Convert to fraction form
   1,502.31/2,072.14 = 1,378.38/x
3. Step 3: Cross multiply
   1,502.31x = 2,072.14 × 1,378.38
4. Step 4: Simplify right side
   1,502.31x = 2,856,196.33
5. Step 5: Solve for x
   x = 2,856,196.33/1,502.31
6. Step 6: Final answer
   x = 1,901.20