Finding the Fourth Proportional to 521,061.22, 718,836.24 and 306,104.32

Step by Step Solution

1. Step 1: Write the proportion equation
   521,061.22 : 718,836.24 = 306,104.32 : x
2. Step 2: Convert to fraction form
   521,061.22/718,836.24 = 306,104.32/x
3. Step 3: Cross multiply
   521,061.22x = 718,836.24 × 306,104.32
4. Step 4: Simplify right side
   521,061.22x = 220,038,878,436.56
5. Step 5: Solve for x
   x = 220,038,878,436.56/521,061.22
6. Step 6: Final answer
   x = 422,289.88