Finding the Fourth Proportional to 383,619.54, 529,375.59 and 213,820.86

Step by Step Solution

1. Step 1: Write the proportion equation
   383,619.54 : 529,375.59 = 213,820.86 : x
2. Step 2: Convert to fraction form
   383,619.54/529,375.59 = 213,820.86/x
3. Step 3: Cross multiply
   383,619.54x = 529,375.59 × 213,820.86
4. Step 4: Simplify right side
   383,619.54x = 113,191,543,916.81
5. Step 5: Solve for x
   x = 113,191,543,916.81/383,619.54
6. Step 6: Final answer
   x = 295,061.99