Finding the Fourth Proportional to 624,300,327.65, 861,424,940.83 and 356,253,776.83

Step by Step Solution

1. Step 1: Write the proportion equation
   624,300,327.65 : 861,424,940.83 = 356,253,776.83 : x
2. Step 2: Convert to fraction form
   624,300,327.65/861,424,940.83 = 356,253,776.83/x
3. Step 3: Cross multiply
   624,300,327.65x = 861,424,940.83 × 356,253,776.83
4. Step 4: Simplify right side
   624,300,327.65x = 306,885,888,621,939,648
5. Step 5: Solve for x
   x = 306,885,888,621,939,648/624,300,327.65
6. Step 6: Final answer
   x = 491,567,719.94