Finding the Fourth Proportional to 528,667.32, 729,561.63 and 286,949.94

Step by Step Solution

1. Step 1: Write the proportion equation
   528,667.32 : 729,561.63 = 286,949.94 : x
2. Step 2: Convert to fraction form
   528,667.32/729,561.63 = 286,949.94/x
3. Step 3: Cross multiply
   528,667.32x = 729,561.63 × 286,949.94
4. Step 4: Simplify right side
   528,667.32x = 209,347,665,954.80
5. Step 5: Solve for x
   x = 209,347,665,954.80/528,667.32
6. Step 6: Final answer
   x = 395,991.31