Finding the Fourth Proportional to 1,111.86, 1,533.47 and 915.03

Step by Step Solution

1. Step 1: Write the proportion equation
   1,111.86 : 1,533.47 = 915.03 : x
2. Step 2: Convert to fraction form
   1,111.86/1,533.47 = 915.03/x
3. Step 3: Cross multiply
   1,111.86x = 1,533.47 × 915.03
4. Step 4: Simplify right side
   1,111.86x = 1,403,166.48
5. Step 5: Solve for x
   x = 1,403,166.48/1,111.86
6. Step 6: Final answer
   x = 1,262.00