Finding the Fourth Proportional to 56,412.78, 77,685.57 and 52,806.73

Step by Step Solution

1. Step 1: Write the proportion equation
   56,412.78 : 77,685.57 = 52,806.73 : x
2. Step 2: Convert to fraction form
   56,412.78/77,685.57 = 52,806.73/x
3. Step 3: Cross multiply
   56,412.78x = 77,685.57 × 52,806.73
4. Step 4: Simplify right side
   56,412.78x = 4,102,320,871.33
5. Step 5: Solve for x
   x = 4,102,320,871.33/56,412.78
6. Step 6: Final answer
   x = 72,719.71