Finding the Fourth Proportional to 414,611.34, 621,162.50 and 287,984.04

Step by Step Solution

1. Step 1: Write the proportion equation
   414,611.34 : 621,162.50 = 287,984.04 : x
2. Step 2: Convert to fraction form
   414,611.34/621,162.50 = 287,984.04/x
3. Step 3: Cross multiply
   414,611.34x = 621,162.50 × 287,984.04
4. Step 4: Simplify right side
   414,611.34x = 178,884,884,806.58
5. Step 5: Solve for x
   x = 178,884,884,806.58/414,611.34
6. Step 6: Final answer
   x = 431,451.98