Finding the Third Proportional to 12,390.75 and 27,130.50

Step by Step Solution

1. Step 1: Write the proportion equation
   12,390.75 : 27,130.50 = 27,130.50 : x
2. Step 2: Convert to fraction form
   12,390.75/27,130.50 = 27,130.50/x
3. Step 3: Cross multiply
   12,390.75x = 27,130.50 × 27,130.50
4. Step 4: Simplify right side
   12,390.75x = 736,064,030.25
5. Step 5: Solve for x
   x = 736,064,030.25/12,390.75
6. Step 6: Final answer
   x = 59,404.32