Finding the Fourth Proportional to 70,451, 105,674.64 and 20,544.87

Step by Step Solution

1. Step 1: Write the proportion equation
   70,451 : 105,674.64 = 20,544.87 : x
2. Step 2: Convert to fraction form
   70,451/105,674.64 = 20,544.87/x
3. Step 3: Cross multiply
   70,451x = 105,674.64 × 20,544.87
4. Step 4: Simplify right side
   70,451x = 2,171,071,741.10
5. Step 5: Solve for x
   x = 2,171,071,741.10/70,451
6. Step 6: Final answer
   x = 30,816.76