Finding the Fourth Proportional to 402,567.77, 555,667.31 and 259,327.37

Step by Step Solution

1. Step 1: Write the proportion equation
   402,567.77 : 555,667.31 = 259,327.37 : x
2. Step 2: Convert to fraction form
   402,567.77/555,667.31 = 259,327.37/x
3. Step 3: Cross multiply
   402,567.77x = 555,667.31 × 259,327.37
4. Step 4: Simplify right side
   402,567.77x = 144,099,742,097.28
5. Step 5: Solve for x
   x = 144,099,742,097.28/402,567.77
6. Step 6: Final answer
   x = 357,951.51