Finding the Fourth Proportional to 638,740,582.56, 881,461,386.72 and 345,384,450.72

Step by Step Solution

1. Step 1: Write the proportion equation
   638,740,582.56 : 881,461,386.72 = 345,384,450.72 : x
2. Step 2: Convert to fraction form
   638,740,582.56/881,461,386.72 = 345,384,450.72/x
3. Step 3: Cross multiply
   638,740,582.56x = 881,461,386.72 × 345,384,450.72
4. Step 4: Simplify right side
   638,740,582.56x = 304,443,056,883,176,768
5. Step 5: Solve for x
   x = 304,443,056,883,176,768/638,740,582.56
6. Step 6: Final answer
   x = 476,630,208.25