Finding the Fourth Proportional to 469,105,389.57, 647,353,112.20 and 257,411,569.82

Step by Step Solution

1. Step 1: Write the proportion equation
   469,105,389.57 : 647,353,112.20 = 257,411,569.82 : x
2. Step 2: Convert to fraction form
   469,105,389.57/647,353,112.20 = 257,411,569.82/x
3. Step 3: Cross multiply
   469,105,389.57x = 647,353,112.20 × 257,411,569.82
4. Step 4: Simplify right side
   469,105,389.57x = 166,636,180,839,264,608
5. Step 5: Solve for x
   x = 166,636,180,839,264,608/469,105,389.57
6. Step 6: Final answer
   x = 355,221,203.05