Finding the Fourth Proportional to 249,384.55, 343,425.81 and 216,663.82

Step by Step Solution

1. Step 1: Write the proportion equation
   249,384.55 : 343,425.81 = 216,663.82 : x
2. Step 2: Convert to fraction form
   249,384.55/343,425.81 = 216,663.82/x
3. Step 3: Cross multiply
   249,384.55x = 343,425.81 × 216,663.82
4. Step 4: Simplify right side
   249,384.55x = 74,407,949,945.15
5. Step 5: Solve for x
   x = 74,407,949,945.15/249,384.55
6. Step 6: Final answer
   x = 298,366.32