Finding the Fourth Proportional to 91.86, 137.76 and 59.34

Step by Step Solution

1. Step 1: Write the proportion equation
   91.86 : 137.76 = 59.34 : x
2. Step 2: Convert to fraction form
   91.86/137.76 = 59.34/x
3. Step 3: Cross multiply
   91.86x = 137.76 × 59.34
4. Step 4: Simplify right side
   91.86x = 8,174.68
5. Step 5: Solve for x
   x = 8,174.68/91.86
6. Step 6: Final answer
   x = 88.99