Finding the Fourth Proportional to 1,435.23, 2,153.52 and 915.81

Step by Step Solution

1. Step 1: Write the proportion equation
   1,435.23 : 2,153.52 = 915.81 : x
2. Step 2: Convert to fraction form
   1,435.23/2,153.52 = 915.81/x
3. Step 3: Cross multiply
   1,435.23x = 2,153.52 × 915.81
4. Step 4: Simplify right side
   1,435.23x = 1,972,215.15
5. Step 5: Solve for x
   x = 1,972,215.15/1,435.23
6. Step 6: Final answer
   x = 1,374.15