Finding the Fourth Proportional to 112,128,608.10, 168,192,912.15 and 112,128,608.10

Step by Step Solution

1. Step 1: Write the proportion equation
   112,128,608.10 : 168,192,912.15 = 112,128,608.10 : x
2. Step 2: Convert to fraction form
   112,128,608.10/168,192,912.15 = 112,128,608.10/x
3. Step 3: Cross multiply
   112,128,608.10x = 168,192,912.15 × 112,128,608.10
4. Step 4: Simplify right side
   112,128,608.10x = 18,859,237,131,665,080
5. Step 5: Solve for x
   x = 18,859,237,131,665,080/112,128,608.10
6. Step 6: Final answer
   x = 168,192,912.15