Finding the Third Proportional to 42,213.66 and 64,190.81

Step by Step Solution

1. Step 1: Write the proportion equation
   42,213.66 : 64,190.81 = 64,190.81 : x
2. Step 2: Convert to fraction form
   42,213.66/64,190.81 = 64,190.81/x
3. Step 3: Cross multiply
   42,213.66x = 64,190.81 × 64,190.81
4. Step 4: Simplify right side
   42,213.66x = 4,120,460,409.41
5. Step 5: Solve for x
   x = 4,120,460,409.41/42,213.66
6. Step 6: Final answer
   x = 97,609.65