Finding the Fourth Proportional to 53,196.72, 79,695.42 and 47,719.50

Step by Step Solution

1. Step 1: Write the proportion equation
   53,196.72 : 79,695.42 = 47,719.50 : x
2. Step 2: Convert to fraction form
   53,196.72/79,695.42 = 47,719.50/x
3. Step 3: Cross multiply
   53,196.72x = 79,695.42 × 47,719.50
4. Step 4: Simplify right side
   53,196.72x = 3,803,025,594.69
5. Step 5: Solve for x
   x = 3,803,025,594.69/53,196.72
6. Step 6: Final answer
   x = 71,489.85