Finding the Fourth Proportional to 69.31, 103.98 and 56.58

Step by Step Solution

1. Step 1: Write the proportion equation
   69.31 : 103.98 = 56.58 : x
2. Step 2: Convert to fraction form
   69.31/103.98 = 56.58/x
3. Step 3: Cross multiply
   69.31x = 103.98 × 56.58
4. Step 4: Simplify right side
   69.31x = 5,883.19
5. Step 5: Solve for x
   x = 5,883.19/69.31
6. Step 6: Final answer
   x = 84.88