Finding the Fourth Proportional to 34,869.89, 48,120.78 and 20,720.00

Step by Step Solution

1. Step 1: Write the proportion equation
   34,869.89 : 48,120.78 = 20,720.00 : x
2. Step 2: Convert to fraction form
   34,869.89/48,120.78 = 20,720.00/x
3. Step 3: Cross multiply
   34,869.89x = 48,120.78 × 20,720.00
4. Step 4: Simplify right side
   34,869.89x = 997,062,759.60
5. Step 5: Solve for x
   x = 997,062,759.60/34,869.89
6. Step 6: Final answer
   x = 28,593.80