Finding the Fourth Proportional to 383,505.78, 529,256.00 and 213,741.12

Step by Step Solution

1. Step 1: Write the proportion equation
   383,505.78 : 529,256.00 = 213,741.12 : x
2. Step 2: Convert to fraction form
   383,505.78/529,256.00 = 213,741.12/x
3. Step 3: Cross multiply
   383,505.78x = 529,256.00 × 213,741.12
4. Step 4: Simplify right side
   383,505.78x = 113,123,769,138.01
5. Step 5: Solve for x
   x = 113,123,769,138.01/383,505.78
6. Step 6: Final answer
   x = 294,972.79