Finding the Fourth Proportional to 142,572,817.91, 197,110,308.17 and 105,344,380.78

Step by Step Solution

1. Step 1: Write the proportion equation
   142,572,817.91 : 197,110,308.17 = 105,344,380.78 : x
2. Step 2: Convert to fraction form
   142,572,817.91/197,110,308.17 = 105,344,380.78/x
3. Step 3: Cross multiply
   142,572,817.91x = 197,110,308.17 × 105,344,380.78
4. Step 4: Simplify right side
   142,572,817.91x = 20,764,463,359,294,212
5. Step 5: Solve for x
   x = 20,764,463,359,294,212/142,572,817.91
6. Step 6: Final answer
   x = 145,641,109.32