Finding the Fourth Proportional to 128,851.98, 177,824.61 and 72,267

Step by Step Solution

1. Step 1: Write the proportion equation
   128,851.98 : 177,824.61 = 72,267 : x
2. Step 2: Convert to fraction form
   128,851.98/177,824.61 = 72,267/x
3. Step 3: Cross multiply
   128,851.98x = 177,824.61 × 72,267
4. Step 4: Simplify right side
   128,851.98x = 12,850,851,090.87
5. Step 5: Solve for x
   x = 12,850,851,090.87/128,851.98
6. Step 6: Final answer
   x = 99,733.44