Finding the Third Proportional to 53,810.79 and 83,986.66

Step by Step Solution

1. Step 1: Write the proportion equation
   53,810.79 : 83,986.66 = 83,986.66 : x
2. Step 2: Convert to fraction form
   53,810.79/83,986.66 = 83,986.66/x
3. Step 3: Cross multiply
   53,810.79x = 83,986.66 × 83,986.66
4. Step 4: Simplify right side
   53,810.79x = 7,053,759,740.35
5. Step 5: Solve for x
   x = 7,053,759,740.35/53,810.79
6. Step 6: Final answer
   x = 131,084.49