Finding the Fourth Proportional to 1,327.34, 1,987.41 and 915.98

Step by Step Solution

1. Step 1: Write the proportion equation
   1,327.34 : 1,987.41 = 915.98 : x
2. Step 2: Convert to fraction form
   1,327.34/1,987.41 = 915.98/x
3. Step 3: Cross multiply
   1,327.34x = 1,987.41 × 915.98
4. Step 4: Simplify right side
   1,327.34x = 1,820,427.81
5. Step 5: Solve for x
   x = 1,820,427.81/1,327.34
6. Step 6: Final answer
   x = 1,371.49