Finding the Third Proportional to 39,384.56 and 86,423.06

Step by Step Solution

1. Step 1: Write the proportion equation
   39,384.56 : 86,423.06 = 86,423.06 : x
2. Step 2: Convert to fraction form
   39,384.56/86,423.06 = 86,423.06/x
3. Step 3: Cross multiply
   39,384.56x = 86,423.06 × 86,423.06
4. Step 4: Simplify right side
   39,384.56x = 7,468,945,731.88
5. Step 5: Solve for x
   x = 7,468,945,731.88/39,384.56
6. Step 6: Final answer
   x = 189,641.45