Finding the Fourth Proportional to 102,658.50, 141,668.73 and 55,554.50

Step by Step Solution

1. Step 1: Write the proportion equation
   102,658.50 : 141,668.73 = 55,554.50 : x
2. Step 2: Convert to fraction form
   102,658.50/141,668.73 = 55,554.50/x
3. Step 3: Cross multiply
   102,658.50x = 141,668.73 × 55,554.50
4. Step 4: Simplify right side
   102,658.50x = 7,870,335,460.79
5. Step 5: Solve for x
   x = 7,870,335,460.79/102,658.50
6. Step 6: Final answer
   x = 76,665.21