Finding the Fourth Proportional to 47,981.55, 71,945.33 and 18,400.35

Step by Step Solution

1. Step 1: Write the proportion equation
   47,981.55 : 71,945.33 = 18,400.35 : x
2. Step 2: Convert to fraction form
   47,981.55/71,945.33 = 18,400.35/x
3. Step 3: Cross multiply
   47,981.55x = 71,945.33 × 18,400.35
4. Step 4: Simplify right side
   47,981.55x = 1,323,819,160.86
5. Step 5: Solve for x
   x = 1,323,819,160.86/47,981.55
6. Step 6: Final answer
   x = 27,590.17