Finding the Fourth Proportional to 403,353.50, 556,606.69 and 222,030.01

Step by Step Solution

1. Step 1: Write the proportion equation
   403,353.50 : 556,606.69 = 222,030.01 : x
2. Step 2: Convert to fraction form
   403,353.50/556,606.69 = 222,030.01/x
3. Step 3: Cross multiply
   403,353.50x = 556,606.69 × 222,030.01
4. Step 4: Simplify right side
   403,353.50x = 123,583,387,836.62
5. Step 5: Solve for x
   x = 123,583,387,836.62/403,353.50
6. Step 6: Final answer
   x = 306,389.78