Finding the Fourth Proportional to 42,982,830.56, 64,474,743.38 and 18,387,413.03

Step by Step Solution

1. Step 1: Write the proportion equation
   42,982,830.56 : 64,474,743.38 = 18,387,413.03 : x
2. Step 2: Convert to fraction form
   42,982,830.56/64,474,743.38 = 18,387,413.03/x
3. Step 3: Cross multiply
   42,982,830.56x = 64,474,743.38 × 18,387,413.03
4. Step 4: Simplify right side
   42,982,830.56x = 1,185,523,736,117,007.25
5. Step 5: Solve for x
   x = 1,185,523,736,117,007.25/42,982,830.56
6. Step 6: Final answer
   x = 27,581,332.38