Finding the Fourth Proportional to 111,222.72, 153,416.70 and 72,984.78

Step by Step Solution

1. Step 1: Write the proportion equation
   111,222.72 : 153,416.70 = 72,984.78 : x
2. Step 2: Convert to fraction form
   111,222.72/153,416.70 = 72,984.78/x
3. Step 3: Cross multiply
   111,222.72x = 153,416.70 × 72,984.78
4. Step 4: Simplify right side
   111,222.72x = 11,197,084,097.83
5. Step 5: Solve for x
   x = 11,197,084,097.83/111,222.72
6. Step 6: Final answer
   x = 100,672.63