Finding the Fourth Proportional to 404,719.31, 558,509.52 and 223,431.50

Step by Step Solution

1. Step 1: Write the proportion equation
   404,719.31 : 558,509.52 = 223,431.50 : x
2. Step 2: Convert to fraction form
   404,719.31/558,509.52 = 223,431.50/x
3. Step 3: Cross multiply
   404,719.31x = 558,509.52 × 223,431.50
4. Step 4: Simplify right side
   404,719.31x = 124,788,619,817.88
5. Step 5: Solve for x
   x = 124,788,619,817.88/404,719.31
6. Step 6: Final answer
   x = 308,333.74