Finding the Fourth Proportional to 368,422,200.72, 508,239,092.49 and 219,638,483.94

Step by Step Solution

1. Step 1: Write the proportion equation
   368,422,200.72 : 508,239,092.49 = 219,638,483.94 : x
2. Step 2: Convert to fraction form
   368,422,200.72/508,239,092.49 = 219,638,483.94/x
3. Step 3: Cross multiply
   368,422,200.72x = 508,239,092.49 × 219,638,483.94
4. Step 4: Simplify right side
   368,422,200.72x = 111,628,863,753,545,040
5. Step 5: Solve for x
   x = 111,628,863,753,545,040/368,422,200.72
6. Step 6: Final answer
   x = 302,991,685.99