Finding the Fourth Proportional to 445,196.20, 614,367.30 and 243,991.72

Step by Step Solution

1. Step 1: Write the proportion equation
   445,196.20 : 614,367.30 = 243,991.72 : x
2. Step 2: Convert to fraction form
   445,196.20/614,367.30 = 243,991.72/x
3. Step 3: Cross multiply
   445,196.20x = 614,367.30 × 243,991.72
4. Step 4: Simplify right side
   445,196.20x = 149,900,534,238.76
5. Step 5: Solve for x
   x = 149,900,534,238.76/445,196.20
6. Step 6: Final answer
   x = 336,706.68