Finding the Fourth Proportional to 1,111.38, 1,666.52 and 526.02

Step by Step Solution

1. Step 1: Write the proportion equation
   1,111.38 : 1,666.52 = 526.02 : x
2. Step 2: Convert to fraction form
   1,111.38/1,666.52 = 526.02/x
3. Step 3: Cross multiply
   1,111.38x = 1,666.52 × 526.02
4. Step 4: Simplify right side
   1,111.38x = 876,622.85
5. Step 5: Solve for x
   x = 876,622.85/1,111.38
6. Step 6: Final answer
   x = 788.77