Finding the Fourth Proportional to 112,713.89, 169,007.51 and 77,215.24

Step by Step Solution

1. Step 1: Write the proportion equation
   112,713.89 : 169,007.51 = 77,215.24 : x
2. Step 2: Convert to fraction form
   112,713.89/169,007.51 = 77,215.24/x
3. Step 3: Cross multiply
   112,713.89x = 169,007.51 × 77,215.24
4. Step 4: Simplify right side
   112,713.89x = 13,049,954,637.86
5. Step 5: Solve for x
   x = 13,049,954,637.86/112,713.89
6. Step 6: Final answer
   x = 115,779.47