Finding the Third Proportional to 53,430 and 83,061.75

Step by Step Solution

1. Step 1: Write the proportion equation
   53,430 : 83,061.75 = 83,061.75 : x
2. Step 2: Convert to fraction form
   53,430/83,061.75 = 83,061.75/x
3. Step 3: Cross multiply
   53,430x = 83,061.75 × 83,061.75
4. Step 4: Simplify right side
   53,430x = 6,899,254,313.06
5. Step 5: Solve for x
   x = 6,899,254,313.06/53,430
6. Step 6: Final answer
   x = 129,126.98