Finding the Fourth Proportional to 52,311.40, 78,465.88 and 12,868.86

Step by Step Solution

1. Step 1: Write the proportion equation
   52,311.40 : 78,465.88 = 12,868.86 : x
2. Step 2: Convert to fraction form
   52,311.40/78,465.88 = 12,868.86/x
3. Step 3: Cross multiply
   52,311.40x = 78,465.88 × 12,868.86
4. Step 4: Simplify right side
   52,311.40x = 1,009,766,424.50
5. Step 5: Solve for x
   x = 1,009,766,424.50/52,311.40
6. Step 6: Final answer
   x = 19,302.99