Finding the Fourth Proportional to 105.61, 158.43 and 59.98

Step by Step Solution

1. Step 1: Write the proportion equation
   105.61 : 158.43 = 59.98 : x
2. Step 2: Convert to fraction form
   105.61/158.43 = 59.98/x
3. Step 3: Cross multiply
   105.61x = 158.43 × 59.98
4. Step 4: Simplify right side
   105.61x = 9,502.63
5. Step 5: Solve for x
   x = 9,502.63/105.61
6. Step 6: Final answer
   x = 89.98