Finding the Fourth Proportional to 56,964.48, 78,647.88 and 50,985.72

Step by Step Solution

1. Step 1: Write the proportion equation
   56,964.48 : 78,647.88 = 50,985.72 : x
2. Step 2: Convert to fraction form
   56,964.48/78,647.88 = 50,985.72/x
3. Step 3: Cross multiply
   56,964.48x = 78,647.88 × 50,985.72
4. Step 4: Simplify right side
   56,964.48x = 4,009,918,788.27
5. Step 5: Solve for x
   x = 4,009,918,788.27/56,964.48
6. Step 6: Final answer
   x = 70,393.32