Finding the Fourth Proportional to 216,387,189.94, 298,520,487.56 and 143,150,333.62

Step by Step Solution

1. Step 1: Write the proportion equation
   216,387,189.94 : 298,520,487.56 = 143,150,333.62 : x
2. Step 2: Convert to fraction form
   216,387,189.94/298,520,487.56 = 143,150,333.62/x
3. Step 3: Cross multiply
   216,387,189.94x = 298,520,487.56 × 143,150,333.62
4. Step 4: Simplify right side
   216,387,189.94x = 42,733,307,386,619,064
5. Step 5: Solve for x
   x = 42,733,307,386,619,064/216,387,189.94
6. Step 6: Final answer
   x = 197,485,384.41