Finding the Fourth Proportional to 216,013,729, 298,003,950.72 and 126,660,064.56

Step by Step Solution

1. Step 1: Write the proportion equation
   216,013,729 : 298,003,950.72 = 126,660,064.56 : x
2. Step 2: Convert to fraction form
   216,013,729/298,003,950.72 = 126,660,064.56/x
3. Step 3: Cross multiply
   216,013,729x = 298,003,950.72 × 126,660,064.56
4. Step 4: Simplify right side
   216,013,729x = 37,745,199,637,330,264
5. Step 5: Solve for x
   x = 37,745,199,637,330,264/216,013,729
6. Step 6: Final answer
   x = 174,735,188.42