Finding the Fourth Proportional to 87,644, 120,948.72 and 47,900

Step by Step Solution

1. Step 1: Write the proportion equation
   87,644 : 120,948.72 = 47,900 : x
2. Step 2: Convert to fraction form
   87,644/120,948.72 = 47,900/x
3. Step 3: Cross multiply
   87,644x = 120,948.72 × 47,900
4. Step 4: Simplify right side
   87,644x = 5,793,443,688
5. Step 5: Solve for x
   x = 5,793,443,688/87,644
6. Step 6: Final answer
   x = 66,102