Finding the Fourth Proportional to 259,906.38, 358,672.50 and 152,478.78

Step by Step Solution

1. Step 1: Write the proportion equation
   259,906.38 : 358,672.50 = 152,478.78 : x
2. Step 2: Convert to fraction form
   259,906.38/358,672.50 = 152,478.78/x
3. Step 3: Cross multiply
   259,906.38x = 358,672.50 × 152,478.78
4. Step 4: Simplify right side
   259,906.38x = 54,689,945,219.55
5. Step 5: Solve for x
   x = 54,689,945,219.55/259,906.38
6. Step 6: Final answer
   x = 210,421.71