Finding the Fourth Proportional to 49,991.79, 74,987.61 and 20,019.53

Step by Step Solution

1. Step 1: Write the proportion equation
   49,991.79 : 74,987.61 = 20,019.53 : x
2. Step 2: Convert to fraction form
   49,991.79/74,987.61 = 20,019.53/x
3. Step 3: Cross multiply
   49,991.79x = 74,987.61 × 20,019.53
4. Step 4: Simplify right side
   49,991.79x = 1,501,216,333.09
5. Step 5: Solve for x
   x = 1,501,216,333.09/49,991.79
6. Step 6: Final answer
   x = 30,029.26