Finding the Fourth Proportional to 420,404.96, 579,870 and 250,508

Step by Step Solution

1. Step 1: Write the proportion equation
   420,404.96 : 579,870 = 250,508 : x
2. Step 2: Convert to fraction form
   420,404.96/579,870 = 250,508/x
3. Step 3: Cross multiply
   420,404.96x = 579,870 × 250,508
4. Step 4: Simplify right side
   420,404.96x = 145,262,073,960
5. Step 5: Solve for x
   x = 145,262,073,960/420,404.96
6. Step 6: Final answer
   x = 345,528.93