Finding the Fourth Proportional to 42,118,949, 63,170,433.66 and 20,531,839.88

Step by Step Solution

1. Step 1: Write the proportion equation
   42,118,949 : 63,170,433.66 = 20,531,839.88 : x
2. Step 2: Convert to fraction form
   42,118,949/63,170,433.66 = 20,531,839.88/x
3. Step 3: Cross multiply
   42,118,949x = 63,170,433.66 × 20,531,839.88
4. Step 4: Simplify right side
   42,118,949x = 1,297,005,229,057,282.25
5. Step 5: Solve for x
   x = 1,297,005,229,057,282.25/42,118,949
6. Step 6: Final answer
   x = 30,793,864.99