Finding the Fourth Proportional to 59.99, 90.05 and 45.59

Step by Step Solution

1. Step 1: Write the proportion equation
   59.99 : 90.05 = 45.59 : x
2. Step 2: Convert to fraction form
   59.99/90.05 = 45.59/x
3. Step 3: Cross multiply
   59.99x = 90.05 × 45.59
4. Step 4: Simplify right side
   59.99x = 4,105.38
5. Step 5: Solve for x
   x = 4,105.38/59.99
6. Step 6: Final answer
   x = 68.43