Finding the Fourth Proportional to 491,025,510.81, 678,501,579.83 and 349,651,289.86

Step by Step Solution

1. Step 1: Write the proportion equation
   491,025,510.81 : 678,501,579.83 = 349,651,289.86 : x
2. Step 2: Convert to fraction form
   491,025,510.81/678,501,579.83 = 349,651,289.86/x
3. Step 3: Cross multiply
   491,025,510.81x = 678,501,579.83 × 349,651,289.86
4. Step 4: Simplify right side
   491,025,510.81x = 237,238,952,556,162,784
5. Step 5: Solve for x
   x = 237,238,952,556,162,784/491,025,510.81
6. Step 6: Final answer
   x = 483,149,953.18