Finding the Fourth Proportional to 78,953.72, 108,953.76 and 47,143.88

Step by Step Solution

1. Step 1: Write the proportion equation
   78,953.72 : 108,953.76 = 47,143.88 : x
2. Step 2: Convert to fraction form
   78,953.72/108,953.76 = 47,143.88/x
3. Step 3: Cross multiply
   78,953.72x = 108,953.76 × 47,143.88
4. Step 4: Simplify right side
   78,953.72x = 5,136,502,986.99
5. Step 5: Solve for x
   x = 5,136,502,986.99/78,953.72
6. Step 6: Final answer
   x = 65,057.14