Finding the Fourth Proportional to 262,096.30, 392,568.18 and 216,602.05

Step by Step Solution

1. Step 1: Write the proportion equation
   262,096.30 : 392,568.18 = 216,602.05 : x
2. Step 2: Convert to fraction form
   262,096.30/392,568.18 = 216,602.05/x
3. Step 3: Cross multiply
   262,096.30x = 392,568.18 × 216,602.05
4. Step 4: Simplify right side
   262,096.30x = 85,031,072,552.77
5. Step 5: Solve for x
   x = 85,031,072,552.77/262,096.30
6. Step 6: Final answer
   x = 324,426.83