Finding the Fourth Proportional to 7,172,124, 9,897,242.40 and 3,908,868.50

Step by Step Solution

1. Step 1: Write the proportion equation
   7,172,124 : 9,897,242.40 = 3,908,868.50 : x
2. Step 2: Convert to fraction form
   7,172,124/9,897,242.40 = 3,908,868.50/x
3. Step 3: Cross multiply
   7,172,124x = 9,897,242.40 × 3,908,868.50
4. Step 4: Simplify right side
   7,172,124x = 38,687,019,004,738.19
5. Step 5: Solve for x
   x = 38,687,019,004,738.19/7,172,124
6. Step 6: Final answer
   x = 5,394,081.17