Finding the Third Proportional to 53,145 and 81,130.50

Step by Step Solution

1. Step 1: Write the proportion equation
   53,145 : 81,130.50 = 81,130.50 : x
2. Step 2: Convert to fraction form
   53,145/81,130.50 = 81,130.50/x
3. Step 3: Cross multiply
   53,145x = 81,130.50 × 81,130.50
4. Step 4: Simplify right side
   53,145x = 6,582,158,030.25
5. Step 5: Solve for x
   x = 6,582,158,030.25/53,145
6. Step 6: Final answer
   x = 123,852.82