Finding the Fourth Proportional to 139,469,662.18, 209,234,760.50 and 42,422,847.50

Step by Step Solution

1. Step 1: Write the proportion equation
   139,469,662.18 : 209,234,760.50 = 42,422,847.50 : x
2. Step 2: Convert to fraction form
   139,469,662.18/209,234,760.50 = 42,422,847.50/x
3. Step 3: Cross multiply
   139,469,662.18x = 209,234,760.50 × 42,422,847.50
4. Step 4: Simplify right side
   139,469,662.18x = 8,876,334,336,390,524
5. Step 5: Solve for x
   x = 8,876,334,336,390,524/139,469,662.18
6. Step 6: Final answer
   x = 63,643,477.71