Finding the Fourth Proportional to 72.47, 99.99 and 43.34

Step by Step Solution

1. Step 1: Write the proportion equation
   72.47 : 99.99 = 43.34 : x
2. Step 2: Convert to fraction form
   72.47/99.99 = 43.34/x
3. Step 3: Cross multiply
   72.47x = 99.99 × 43.34
4. Step 4: Simplify right side
   72.47x = 4,333.57
5. Step 5: Solve for x
   x = 4,333.57/72.47
6. Step 6: Final answer
   x = 59.80