Finding the Fourth Proportional to 78,077.12, 117,113.55 and 21,917.69

Step by Step Solution

1. Step 1: Write the proportion equation
   78,077.12 : 117,113.55 = 21,917.69 : x
2. Step 2: Convert to fraction form
   78,077.12/117,113.55 = 21,917.69/x
3. Step 3: Cross multiply
   78,077.12x = 117,113.55 × 21,917.69
4. Step 4: Simplify right side
   78,077.12x = 2,566,858,255.12
5. Step 5: Solve for x
   x = 2,566,858,255.12/78,077.12
6. Step 6: Final answer
   x = 32,875.94