Finding the Fourth Proportional to 77,910.72, 116,781.84 and 31,112.16

Step by Step Solution

1. Step 1: Write the proportion equation
   77,910.72 : 116,781.84 = 31,112.16 : x
2. Step 2: Convert to fraction form
   77,910.72/116,781.84 = 31,112.16/x
3. Step 3: Cross multiply
   77,910.72x = 116,781.84 × 31,112.16
4. Step 4: Simplify right side
   77,910.72x = 3,633,335,291.17
5. Step 5: Solve for x
   x = 3,633,335,291.17/77,910.72
6. Step 6: Final answer
   x = 46,634.60