Finding the Fourth Proportional to 93.50, 139.89 and 56.81

Step by Step Solution

1. Step 1: Write the proportion equation
   93.50 : 139.89 = 56.81 : x
2. Step 2: Convert to fraction form
   93.50/139.89 = 56.81/x
3. Step 3: Cross multiply
   93.50x = 139.89 × 56.81
4. Step 4: Simplify right side
   93.50x = 7,946.45
5. Step 5: Solve for x
   x = 7,946.45/93.50
6. Step 6: Final answer
   x = 84.99