Finding the Fourth Proportional to 69.57, 104.59 and 56.13

Step by Step Solution

1. Step 1: Write the proportion equation
   69.57 : 104.59 = 56.13 : x
2. Step 2: Convert to fraction form
   69.57/104.59 = 56.13/x
3. Step 3: Cross multiply
   69.57x = 104.59 × 56.13
4. Step 4: Simplify right side
   69.57x = 5,870.31
5. Step 5: Solve for x
   x = 5,870.31/69.57
6. Step 6: Final answer
   x = 84.38