Finding the Fourth Proportional to 56,661.96, 78,147 and 50,293.20

Step by Step Solution

1. Step 1: Write the proportion equation
   56,661.96 : 78,147 = 50,293.20 : x
2. Step 2: Convert to fraction form
   56,661.96/78,147 = 50,293.20/x
3. Step 3: Cross multiply
   56,661.96x = 78,147 × 50,293.20
4. Step 4: Simplify right side
   56,661.96x = 3,930,262,700.40
5. Step 5: Solve for x
   x = 3,930,262,700.40/56,661.96
6. Step 6: Final answer
   x = 69,363.34