Finding the Fourth Proportional to 72.86, 109.32 and 43.98

Step by Step Solution

1. Step 1: Write the proportion equation
   72.86 : 109.32 = 43.98 : x
2. Step 2: Convert to fraction form
   72.86/109.32 = 43.98/x
3. Step 3: Cross multiply
   72.86x = 109.32 × 43.98
4. Step 4: Simplify right side
   72.86x = 4,807.89
5. Step 5: Solve for x
   x = 4,807.89/72.86
6. Step 6: Final answer
   x = 65.99