Finding the Fourth Proportional to 521,061.72, 718,836.93 and 306,104.82

Step by Step Solution

1. Step 1: Write the proportion equation
   521,061.72 : 718,836.93 = 306,104.82 : x
2. Step 2: Convert to fraction form
   521,061.72/718,836.93 = 306,104.82/x
3. Step 3: Cross multiply
   521,061.72x = 718,836.93 × 306,104.82
4. Step 4: Simplify right side
   521,061.72x = 220,039,449,067.00
5. Step 5: Solve for x
   x = 220,039,449,067.00/521,061.72
6. Step 6: Final answer
   x = 422,290.57