Finding the Fourth Proportional to 112,386.55, 168,662.78 and 53,222.12

Step by Step Solution

1. Step 1: Write the proportion equation
   112,386.55 : 168,662.78 = 53,222.12 : x
2. Step 2: Convert to fraction form
   112,386.55/168,662.78 = 53,222.12/x
3. Step 3: Cross multiply
   112,386.55x = 168,662.78 × 53,222.12
4. Step 4: Simplify right side
   112,386.55x = 8,976,590,450.58
5. Step 5: Solve for x
   x = 8,976,590,450.58/112,386.55
6. Step 6: Final answer
   x = 79,872.47