Finding the Fourth Proportional to 385,840.50, 532,463.61 and 213,762.12

Step by Step Solution

1. Step 1: Write the proportion equation
   385,840.50 : 532,463.61 = 213,762.12 : x
2. Step 2: Convert to fraction form
   385,840.50/532,463.61 = 213,762.12/x
3. Step 3: Cross multiply
   385,840.50x = 532,463.61 × 213,762.12
4. Step 4: Simplify right side
   385,840.50x = 113,820,550,096.45
5. Step 5: Solve for x
   x = 113,820,550,096.45/385,840.50
6. Step 6: Final answer
   x = 294,993.79