Finding the Fourth Proportional to 111,972,144.79, 154,587,843.47 and 99,547,921.55

Step by Step Solution

1. Step 1: Write the proportion equation
   111,972,144.79 : 154,587,843.47 = 99,547,921.55 : x
2. Step 2: Convert to fraction form
   111,972,144.79/154,587,843.47 = 99,547,921.55/x
3. Step 3: Cross multiply
   111,972,144.79x = 154,587,843.47 × 99,547,921.55
4. Step 4: Simplify right side
   111,972,144.79x = 15,388,898,513,837,500
5. Step 5: Solve for x
   x = 15,388,898,513,837,500/111,972,144.79
6. Step 6: Final answer
   x = 137,435,060.69