Finding the Fourth Proportional to 383,123.34, 528,710.17 and 222,071.80

Step by Step Solution

1. Step 1: Write the proportion equation
   383,123.34 : 528,710.17 = 222,071.80 : x
2. Step 2: Convert to fraction form
   383,123.34/528,710.17 = 222,071.80/x
3. Step 3: Cross multiply
   383,123.34x = 528,710.17 × 222,071.80
4. Step 4: Simplify right side
   383,123.34x = 117,411,619,130.21
5. Step 5: Solve for x
   x = 117,411,619,130.21/383,123.34
6. Step 6: Final answer
   x = 306,459.06