Finding the Fourth Proportional to 102,993.52, 142,144.48 and 57,688.80

Step by Step Solution

1. Step 1: Write the proportion equation
   102,993.52 : 142,144.48 = 57,688.80 : x
2. Step 2: Convert to fraction form
   102,993.52/142,144.48 = 57,688.80/x
3. Step 3: Cross multiply
   102,993.52x = 142,144.48 × 57,688.80
4. Step 4: Simplify right side
   102,993.52x = 8,200,144,477.82
5. Step 5: Solve for x
   x = 8,200,144,477.82/102,993.52
6. Step 6: Final answer
   x = 79,618.06