Finding the Fourth Proportional to 409,039.35, 613,839.27 and 142,799.86

Step by Step Solution

1. Step 1: Write the proportion equation
   409,039.35 : 613,839.27 = 142,799.86 : x
2. Step 2: Convert to fraction form
   409,039.35/613,839.27 = 142,799.86/x
3. Step 3: Cross multiply
   409,039.35x = 613,839.27 × 142,799.86
4. Step 4: Simplify right side
   409,039.35x = 87,656,161,818.50
5. Step 5: Solve for x
   x = 87,656,161,818.50/409,039.35
6. Step 6: Final answer
   x = 214,297.63