Finding the Third Proportional to 39,700 and 87,178.50

Step by Step Solution

1. Step 1: Write the proportion equation
   39,700 : 87,178.50 = 87,178.50 : x
2. Step 2: Convert to fraction form
   39,700/87,178.50 = 87,178.50/x
3. Step 3: Cross multiply
   39,700x = 87,178.50 × 87,178.50
4. Step 4: Simplify right side
   39,700x = 7,600,090,862.25
5. Step 5: Solve for x
   x = 7,600,090,862.25/39,700
6. Step 6: Final answer
   x = 191,438.06