Finding the Fourth Proportional to 407,066.56, 609,809.28 and 229,030.72

Step by Step Solution

1. Step 1: Write the proportion equation
   407,066.56 : 609,809.28 = 229,030.72 : x
2. Step 2: Convert to fraction form
   407,066.56/609,809.28 = 229,030.72/x
3. Step 3: Cross multiply
   407,066.56x = 609,809.28 × 229,030.72
4. Step 4: Simplify right side
   407,066.56x = 139,665,058,461.08
5. Step 5: Solve for x
   x = 139,665,058,461.08/407,066.56
6. Step 6: Final answer
   x = 343,101.28