Finding the Fourth Proportional to 128,333.21, 177,100.22 and 71,744.59

Step by Step Solution

1. Step 1: Write the proportion equation
   128,333.21 : 177,100.22 = 71,744.59 : x
2. Step 2: Convert to fraction form
   128,333.21/177,100.22 = 71,744.59/x
3. Step 3: Cross multiply
   128,333.21x = 177,100.22 × 71,744.59
4. Step 4: Simplify right side
   128,333.21x = 12,705,982,077.36
5. Step 5: Solve for x
   x = 12,705,982,077.36/128,333.21
6. Step 6: Final answer
   x = 99,007.75