Finding the Fourth Proportional to 128,523.84, 177,354.56 and 71,934.72

Step by Step Solution

1. Step 1: Write the proportion equation
   128,523.84 : 177,354.56 = 71,934.72 : x
2. Step 2: Convert to fraction form
   128,523.84/177,354.56 = 71,934.72/x
3. Step 3: Cross multiply
   128,523.84x = 177,354.56 × 71,934.72
4. Step 4: Simplify right side
   128,523.84x = 12,757,950,614.32
5. Step 5: Solve for x
   x = 12,757,950,614.32/128,523.84
6. Step 6: Final answer
   x = 99,265.25