Finding the Fourth Proportional to 385,799.72, 532,391.52 and 213,710.78

Step by Step Solution

1. Step 1: Write the proportion equation
   385,799.72 : 532,391.52 = 213,710.78 : x
2. Step 2: Convert to fraction form
   385,799.72/532,391.52 = 213,710.78/x
3. Step 3: Cross multiply
   385,799.72x = 532,391.52 × 213,710.78
4. Step 4: Simplify right side
   385,799.72x = 113,777,807,004.59
5. Step 5: Solve for x
   x = 113,777,807,004.59/385,799.72
6. Step 6: Final answer
   x = 294,914.18