Finding the Fourth Proportional to 404,861,679.29, 607,574,434.25 and 142,567,357.35

Step by Step Solution

1. Step 1: Write the proportion equation
   404,861,679.29 : 607,574,434.25 = 142,567,357.35 : x
2. Step 2: Convert to fraction form
   404,861,679.29/607,574,434.25 = 142,567,357.35/x
3. Step 3: Cross multiply
   404,861,679.29x = 607,574,434.25 × 142,567,357.35
4. Step 4: Simplify right side
   404,861,679.29x = 86,620,281,484,443,824
5. Step 5: Solve for x
   x = 86,620,281,484,443,824/404,861,679.29
6. Step 6: Final answer
   x = 213,950,309.24