Finding the Fourth Proportional to 1,111.29, 1,665.54 and 526.29

Step by Step Solution

1. Step 1: Write the proportion equation
   1,111.29 : 1,665.54 = 526.29 : x
2. Step 2: Convert to fraction form
   1,111.29/1,665.54 = 526.29/x
3. Step 3: Cross multiply
   1,111.29x = 1,665.54 × 526.29
4. Step 4: Simplify right side
   1,111.29x = 876,557.05
5. Step 5: Solve for x
   x = 876,557.05/1,111.29
6. Step 6: Final answer
   x = 788.77