Finding the Fourth Proportional to 385,797.72, 532,388.76 and 213,708.78

Step by Step Solution

1. Step 1: Write the proportion equation
   385,797.72 : 532,388.76 = 213,708.78 : x
2. Step 2: Convert to fraction form
   385,797.72/532,388.76 = 213,708.78/x
3. Step 3: Cross multiply
   385,797.72x = 532,388.76 × 213,708.78
4. Step 4: Simplify right side
   385,797.72x = 113,776,152,385.31
5. Step 5: Solve for x
   x = 113,776,152,385.31/385,797.72
6. Step 6: Final answer
   x = 294,911.42