Finding the Fourth Proportional to 12,111,150.56, 18,146,161.20 and 7,308,748.40

Step by Step Solution

1. Step 1: Write the proportion equation
   12,111,150.56 : 18,146,161.20 = 7,308,748.40 : x
2. Step 2: Convert to fraction form
   12,111,150.56/18,146,161.20 = 7,308,748.40/x
3. Step 3: Cross multiply
   12,111,150.56x = 18,146,161.20 × 7,308,748.40
4. Step 4: Simplify right side
   12,111,150.56x = 132,625,726,636,642.08
5. Step 5: Solve for x
   x = 132,625,726,636,642.08/12,111,150.56
6. Step 6: Final answer
   x = 10,950,712.40