Finding the Fourth Proportional to 12,498,462.18, 18,730,667.46 and 7,642,469.28

Step by Step Solution

1. Step 1: Write the proportion equation
   12,498,462.18 : 18,730,667.46 = 7,642,469.28 : x
2. Step 2: Convert to fraction form
   12,498,462.18/18,730,667.46 = 7,642,469.28/x
3. Step 3: Cross multiply
   12,498,462.18x = 18,730,667.46 × 7,642,469.28
4. Step 4: Simplify right side
   12,498,462.18x = 143,148,550,656,945.62
5. Step 5: Solve for x
   x = 143,148,550,656,945.62/12,498,462.18
6. Step 6: Final answer
   x = 11,453,293.10