Finding the Fourth Proportional to 2,670.38, 4,005.63 and 915.37

Step by Step Solution

1. Step 1: Write the proportion equation
   2,670.38 : 4,005.63 = 915.37 : x
2. Step 2: Convert to fraction form
   2,670.38/4,005.63 = 915.37/x
3. Step 3: Cross multiply
   2,670.38x = 4,005.63 × 915.37
4. Step 4: Simplify right side
   2,670.38x = 3,666,622.06
5. Step 5: Solve for x
   x = 3,666,622.06/2,670.38
6. Step 6: Final answer
   x = 1,373.07