Finding the Fourth Proportional to 559,542.72, 838,735.89 and 259,778.84

Step by Step Solution

1. Step 1: Write the proportion equation
   559,542.72 : 838,735.89 = 259,778.84 : x
2. Step 2: Convert to fraction form
   559,542.72/838,735.89 = 259,778.84/x
3. Step 3: Cross multiply
   559,542.72x = 838,735.89 × 259,778.84
4. Step 4: Simplify right side
   559,542.72x = 217,885,832,376.89
5. Step 5: Solve for x
   x = 217,885,832,376.89/559,542.72
6. Step 6: Final answer
   x = 389,399.82