Finding the Fourth Proportional to 52,680, 72,692.42 and 31,170.40

Step by Step Solution

1. Step 1: Write the proportion equation
   52,680 : 72,692.42 = 31,170.40 : x
2. Step 2: Convert to fraction form
   52,680/72,692.42 = 31,170.40/x
3. Step 3: Cross multiply
   52,680x = 72,692.42 × 31,170.40
4. Step 4: Simplify right side
   52,680x = 2,265,851,808.37
5. Step 5: Solve for x
   x = 2,265,851,808.37/52,680
6. Step 6: Final answer
   x = 43,011.61