Finding the Fourth Proportional to 383,100.96, 528,679.30 and 222,049.42

Step by Step Solution

1. Step 1: Write the proportion equation
   383,100.96 : 528,679.30 = 222,049.42 : x
2. Step 2: Convert to fraction form
   383,100.96/528,679.30 = 222,049.42/x
3. Step 3: Cross multiply
   383,100.96x = 528,679.30 × 222,049.42
4. Step 4: Simplify right side
   383,100.96x = 117,392,931,931.01
5. Step 5: Solve for x
   x = 117,392,931,931.01/383,100.96
6. Step 6: Final answer
   x = 306,428.19