Finding the Third Proportional to 53,803.50 and 69,985.50

Step by Step Solution

1. Step 1: Write the proportion equation
   53,803.50 : 69,985.50 = 69,985.50 : x
2. Step 2: Convert to fraction form
   53,803.50/69,985.50 = 69,985.50/x
3. Step 3: Cross multiply
   53,803.50x = 69,985.50 × 69,985.50
4. Step 4: Simplify right side
   53,803.50x = 4,897,970,210.25
5. Step 5: Solve for x
   x = 4,897,970,210.25/53,803.50
6. Step 6: Final answer
   x = 91,034.42