Finding the Third Proportional to 66,936.50 and 89,238.63

Step by Step Solution

1. Step 1: Write the proportion equation
   66,936.50 : 89,238.63 = 89,238.63 : x
2. Step 2: Convert to fraction form
   66,936.50/89,238.63 = 89,238.63/x
3. Step 3: Cross multiply
   66,936.50x = 89,238.63 × 89,238.63
4. Step 4: Simplify right side
   66,936.50x = 7,963,532,191.89
5. Step 5: Solve for x
   x = 7,963,532,191.89/66,936.50
6. Step 6: Final answer
   x = 118,971.45