Finding the Fourth Proportional to 142,572,819.69, 197,110,310.61 and 105,344,382.56

Step by Step Solution

1. Step 1: Write the proportion equation
   142,572,819.69 : 197,110,310.61 = 105,344,382.56 : x
2. Step 2: Convert to fraction form
   142,572,819.69/197,110,310.61 = 105,344,382.56/x
3. Step 3: Cross multiply
   142,572,819.69x = 197,110,310.61 × 105,344,382.56
4. Step 4: Simplify right side
   142,572,819.69x = 20,764,463,966,434,720
5. Step 5: Solve for x
   x = 20,764,463,966,434,720/142,572,819.69
6. Step 6: Final answer
   x = 145,641,111.76