Finding the Fourth Proportional to 1,111.97, 1,666.86 and 525.94

Step by Step Solution

1. Step 1: Write the proportion equation
   1,111.97 : 1,666.86 = 525.94 : x
2. Step 2: Convert to fraction form
   1,111.97/1,666.86 = 525.94/x
3. Step 3: Cross multiply
   1,111.97x = 1,666.86 × 525.94
4. Step 4: Simplify right side
   1,111.97x = 876,662.21
5. Step 5: Solve for x
   x = 876,662.21/1,111.97
6. Step 6: Final answer
   x = 788.38