Finding the Fourth Proportional to 404,508,491.60, 606,789,642.96 and 142,161,313.34

Step by Step Solution

1. Step 1: Write the proportion equation
   404,508,491.60 : 606,789,642.96 = 142,161,313.34 : x
2. Step 2: Convert to fraction form
   404,508,491.60/606,789,642.96 = 142,161,313.34/x
3. Step 3: Cross multiply
   404,508,491.60x = 606,789,642.96 × 142,161,313.34
4. Step 4: Simplify right side
   404,508,491.60x = 86,262,012,565,820,272
5. Step 5: Solve for x
   x = 86,262,012,565,820,272/404,508,491.60
6. Step 6: Final answer
   x = 213,251,425.76