Finding the Fourth Proportional to 400,789.63, 553,089.68 and 219,501.98

Step by Step Solution

1. Step 1: Write the proportion equation
   400,789.63 : 553,089.68 = 219,501.98 : x
2. Step 2: Convert to fraction form
   400,789.63/553,089.68 = 219,501.98/x
3. Step 3: Cross multiply
   400,789.63x = 553,089.68 × 219,501.98
4. Step 4: Simplify right side
   400,789.63x = 121,404,280,162.78
5. Step 5: Solve for x
   x = 121,404,280,162.78/400,789.63
6. Step 6: Final answer
   x = 302,912.73