Finding the Fourth Proportional to 111,128.69, 166,693.14 and 52,005.87

Step by Step Solution

1. Step 1: Write the proportion equation
   111,128.69 : 166,693.14 = 52,005.87 : x
2. Step 2: Convert to fraction form
   111,128.69/166,693.14 = 52,005.87/x
3. Step 3: Cross multiply
   111,128.69x = 166,693.14 × 52,005.87
4. Step 4: Simplify right side
   111,128.69x = 8,669,021,768.73
5. Step 5: Solve for x
   x = 8,669,021,768.73/111,128.69
6. Step 6: Final answer
   x = 78,008.85