Finding the Fourth Proportional to 35,061.09, 48,390.54 and 20,720.31

Step by Step Solution

1. Step 1: Write the proportion equation
   35,061.09 : 48,390.54 = 20,720.31 : x
2. Step 2: Convert to fraction form
   35,061.09/48,390.54 = 20,720.31/x
3. Step 3: Cross multiply
   35,061.09x = 48,390.54 × 20,720.31
4. Step 4: Simplify right side
   35,061.09x = 1,002,666,989.87
5. Step 5: Solve for x
   x = 1,002,666,989.87/35,061.09
6. Step 6: Final answer
   x = 28,597.71