Finding the Fourth Proportional to 87,440, 120,667.20 and 47,696

Step by Step Solution

1. Step 1: Write the proportion equation
   87,440 : 120,667.20 = 47,696 : x
2. Step 2: Convert to fraction form
   87,440/120,667.20 = 47,696/x
3. Step 3: Cross multiply
   87,440x = 120,667.20 × 47,696
4. Step 4: Simplify right side
   87,440x = 5,755,342,771.20
5. Step 5: Solve for x
   x = 5,755,342,771.20/87,440
6. Step 6: Final answer
   x = 65,820.48