Finding the Fourth Proportional to 56,809, 78,314.44 and 39,760.48

Step by Step Solution

1. Step 1: Write the proportion equation
   56,809 : 78,314.44 = 39,760.48 : x
2. Step 2: Convert to fraction form
   56,809/78,314.44 = 39,760.48/x
3. Step 3: Cross multiply
   56,809x = 78,314.44 × 39,760.48
4. Step 4: Simplify right side
   56,809x = 3,113,819,725.33
5. Step 5: Solve for x
   x = 3,113,819,725.33/56,809
6. Step 6: Final answer
   x = 54,812.08