Finding the Fourth Proportional to 1,112.36, 1,667.42 and 526.31

Step by Step Solution

1. Step 1: Write the proportion equation
   1,112.36 : 1,667.42 = 526.31 : x
2. Step 2: Convert to fraction form
   1,112.36/1,667.42 = 526.31/x
3. Step 3: Cross multiply
   1,112.36x = 1,667.42 × 526.31
4. Step 4: Simplify right side
   1,112.36x = 877,585.30
5. Step 5: Solve for x
   x = 877,585.30/1,112.36
6. Step 6: Final answer
   x = 788.94