Finding the Third Proportional to 61,388.16 and 91,704.09

Step by Step Solution

1. Step 1: Write the proportion equation
   61,388.16 : 91,704.09 = 91,704.09 : x
2. Step 2: Convert to fraction form
   61,388.16/91,704.09 = 91,704.09/x
3. Step 3: Cross multiply
   61,388.16x = 91,704.09 × 91,704.09
4. Step 4: Simplify right side
   61,388.16x = 8,409,640,810.51
5. Step 5: Solve for x
   x = 8,409,640,810.51/61,388.16
6. Step 6: Final answer
   x = 136,991.26