Finding the Fourth Proportional to 507,375, 700,199.78 and 281,020.50

Step by Step Solution

1. Step 1: Write the proportion equation
   507,375 : 700,199.78 = 281,020.50 : x
2. Step 2: Convert to fraction form
   507,375/700,199.78 = 281,020.50/x
3. Step 3: Cross multiply
   507,375x = 700,199.78 × 281,020.50
4. Step 4: Simplify right side
   507,375x = 196,770,490,870.39
5. Step 5: Solve for x
   x = 196,770,490,870.39/507,375
6. Step 6: Final answer
   x = 387,820.63