Finding the Fourth Proportional to 78,771.06, 108,721.71 and 50,085.18

Step by Step Solution

1. Step 1: Write the proportion equation
   78,771.06 : 108,721.71 = 50,085.18 : x
2. Step 2: Convert to fraction form
   78,771.06/108,721.71 = 50,085.18/x
3. Step 3: Cross multiply
   78,771.06x = 108,721.71 × 50,085.18
4. Step 4: Simplify right side
   78,771.06x = 5,445,346,415.26
5. Step 5: Solve for x
   x = 5,445,346,415.26/78,771.06
6. Step 6: Final answer
   x = 69,128.77