Finding the Fourth Proportional to 92.37, 137.77 and 78.02

Step by Step Solution

1. Step 1: Write the proportion equation
   92.37 : 137.77 = 78.02 : x
2. Step 2: Convert to fraction form
   92.37/137.77 = 78.02/x
3. Step 3: Cross multiply
   92.37x = 137.77 × 78.02
4. Step 4: Simplify right side
   92.37x = 10,748.82
5. Step 5: Solve for x
   x = 10,748.82/92.37
6. Step 6: Final answer
   x = 116.37