Finding the Fourth Proportional to 186,161,508.72, 256,921,028.10 and 139,036,768.47

Step by Step Solution

1. Step 1: Write the proportion equation
   186,161,508.72 : 256,921,028.10 = 139,036,768.47 : x
2. Step 2: Convert to fraction form
   186,161,508.72/256,921,028.10 = 139,036,768.47/x
3. Step 3: Cross multiply
   186,161,508.72x = 256,921,028.10 × 139,036,768.47
4. Step 4: Simplify right side
   186,161,508.72x = 35,721,469,499,014,064
5. Step 5: Solve for x
   x = 35,721,469,499,014,064/186,161,508.72
6. Step 6: Final answer
   x = 191,884,293.08