Finding the Fourth Proportional to 108,061.70, 148,946.70 and 72,238.64

Step by Step Solution

1. Step 1: Write the proportion equation
   108,061.70 : 148,946.70 = 72,238.64 : x
2. Step 2: Convert to fraction form
   108,061.70/148,946.70 = 72,238.64/x
3. Step 3: Cross multiply
   108,061.70x = 148,946.70 × 72,238.64
4. Step 4: Simplify right side
   108,061.70x = 10,759,707,040.49
5. Step 5: Solve for x
   x = 10,759,707,040.49/108,061.70
6. Step 6: Final answer
   x = 99,570.03