Finding the Fourth Proportional to 52,658.10, 78,984.72 and 13,214.34

Step by Step Solution

1. Step 1: Write the proportion equation
   52,658.10 : 78,984.72 = 13,214.34 : x
2. Step 2: Convert to fraction form
   52,658.10/78,984.72 = 13,214.34/x
3. Step 3: Cross multiply
   52,658.10x = 78,984.72 × 13,214.34
4. Step 4: Simplify right side
   52,658.10x = 1,043,730,944.88
5. Step 5: Solve for x
   x = 1,043,730,944.88/52,658.10
6. Step 6: Final answer
   x = 19,820.90