Finding the Fourth Proportional to 113,978.19, 171,016.50 and 61,377.20

Step by Step Solution

1. Step 1: Write the proportion equation
   113,978.19 : 171,016.50 = 61,377.20 : x
2. Step 2: Convert to fraction form
   113,978.19/171,016.50 = 61,377.20/x
3. Step 3: Cross multiply
   113,978.19x = 171,016.50 × 61,377.20
4. Step 4: Simplify right side
   113,978.19x = 10,496,513,923.80
5. Step 5: Solve for x
   x = 10,496,513,923.80/113,978.19
6. Step 6: Final answer
   x = 92,092.30