Finding the Fourth Proportional to 411,718,651.95, 618,056,274.83 and 248,141,112.15

Step by Step Solution

1. Step 1: Write the proportion equation
   411,718,651.95 : 618,056,274.83 = 248,141,112.15 : x
2. Step 2: Convert to fraction form
   411,718,651.95/618,056,274.83 = 248,141,112.15/x
3. Step 3: Cross multiply
   411,718,651.95x = 618,056,274.83 × 248,141,112.15
4. Step 4: Simplify right side
   411,718,651.95x = 153,365,171,406,361,568
5. Step 5: Solve for x
   x = 153,365,171,406,361,568/411,718,651.95
6. Step 6: Final answer
   x = 372,499,935.77