Finding the Fourth Proportional to 1,093.16, 1,507.01 and 915.57

Step by Step Solution

1. Step 1: Write the proportion equation
   1,093.16 : 1,507.01 = 915.57 : x
2. Step 2: Convert to fraction form
   1,093.16/1,507.01 = 915.57/x
3. Step 3: Cross multiply
   1,093.16x = 1,507.01 × 915.57
4. Step 4: Simplify right side
   1,093.16x = 1,379,768.57
5. Step 5: Solve for x
   x = 1,379,768.57/1,093.16
6. Step 6: Final answer
   x = 1,262.18