Finding the Fourth Proportional to 409,053.27, 613,612.71 and 142,807.89

Step by Step Solution

1. Step 1: Write the proportion equation
   409,053.27 : 613,612.71 = 142,807.89 : x
2. Step 2: Convert to fraction form
   409,053.27/613,612.71 = 142,807.89/x
3. Step 3: Cross multiply
   409,053.27x = 613,612.71 × 142,807.89
4. Step 4: Simplify right side
   409,053.27x = 87,628,736,392.28
5. Step 5: Solve for x
   x = 87,628,736,392.28/409,053.27
6. Step 6: Final answer
   x = 214,223.29