Finding the Fourth Proportional to 52,961.48, 79,442.18 and 13,518.60

Step by Step Solution

1. Step 1: Write the proportion equation
   52,961.48 : 79,442.18 = 13,518.60 : x
2. Step 2: Convert to fraction form
   52,961.48/79,442.18 = 13,518.60/x
3. Step 3: Cross multiply
   52,961.48x = 79,442.18 × 13,518.60
4. Step 4: Simplify right side
   52,961.48x = 1,073,947,054.55
5. Step 5: Solve for x
   x = 1,073,947,054.55/52,961.48
6. Step 6: Final answer
   x = 20,277.89