Finding the Fourth Proportional to 108,061.76, 148,946.72 and 72,238.70

Step by Step Solution

1. Step 1: Write the proportion equation
   108,061.76 : 148,946.72 = 72,238.70 : x
2. Step 2: Convert to fraction form
   108,061.76/148,946.72 = 72,238.70/x
3. Step 3: Cross multiply
   108,061.76x = 148,946.72 × 72,238.70
4. Step 4: Simplify right side
   108,061.76x = 10,759,717,422.06
5. Step 5: Solve for x
   x = 10,759,717,422.06/108,061.76
6. Step 6: Final answer
   x = 99,570.07