Finding the Fourth Proportional to 78,077.69, 117,107.81 and 21,919.98

Step by Step Solution

1. Step 1: Write the proportion equation
   78,077.69 : 117,107.81 = 21,919.98 : x
2. Step 2: Convert to fraction form
   78,077.69/117,107.81 = 21,919.98/x
3. Step 3: Cross multiply
   78,077.69x = 117,107.81 × 21,919.98
4. Step 4: Simplify right side
   78,077.69x = 2,567,000,853.04
5. Step 5: Solve for x
   x = 2,567,000,853.04/78,077.69
6. Step 6: Final answer
   x = 32,877.52