Finding the Third Proportional to 29,990 and 64,132

Step by Step Solution

1. Step 1: Write the proportion equation
   29,990 : 64,132 = 64,132 : x
2. Step 2: Convert to fraction form
   29,990/64,132 = 64,132/x
3. Step 3: Cross multiply
   29,990x = 64,132 × 64,132
4. Step 4: Simplify right side
   29,990x = 4,112,913,424
5. Step 5: Solve for x
   x = 4,112,913,424/29,990
6. Step 6: Final answer
   x = 137,142.83