Finding the Third Proportional to 42,688.13 and 64,169.72

Step by Step Solution

1. Step 1: Write the proportion equation
   42,688.13 : 64,169.72 = 64,169.72 : x
2. Step 2: Convert to fraction form
   42,688.13/64,169.72 = 64,169.72/x
3. Step 3: Cross multiply
   42,688.13x = 64,169.72 × 64,169.72
4. Step 4: Simplify right side
   42,688.13x = 4,117,752,804.45
5. Step 5: Solve for x
   x = 4,117,752,804.45/42,688.13
6. Step 6: Final answer
   x = 96,461.32