Finding the Fourth Proportional to 99,739.72, 149,519.42 and 67,729.47

Step by Step Solution

1. Step 1: Write the proportion equation
   99,739.72 : 149,519.42 = 67,729.47 : x
2. Step 2: Convert to fraction form
   99,739.72/149,519.42 = 67,729.47/x
3. Step 3: Cross multiply
   99,739.72x = 149,519.42 × 67,729.47
4. Step 4: Simplify right side
   99,739.72x = 10,126,870,528.19
5. Step 5: Solve for x
   x = 10,126,870,528.19/99,739.72
6. Step 6: Final answer
   x = 101,532.98