Finding the Fourth Proportional to 249,150,631.89, 373,639,401.83 and 138,654,923.07

Step by Step Solution

1. Step 1: Write the proportion equation
   249,150,631.89 : 373,639,401.83 = 138,654,923.07 : x
2. Step 2: Convert to fraction form
   249,150,631.89/373,639,401.83 = 138,654,923.07/x
3. Step 3: Cross multiply
   249,150,631.89x = 373,639,401.83 × 138,654,923.07
4. Step 4: Simplify right side
   249,150,631.89x = 51,806,942,518,017,624
5. Step 5: Solve for x
   x = 51,806,942,518,017,624/249,150,631.89
6. Step 6: Final answer
   x = 207,934,220.85