Finding the Third Proportional to 117,070.50 and 248,719.50

Step by Step Solution

1. Step 1: Write the proportion equation
   117,070.50 : 248,719.50 = 248,719.50 : x
2. Step 2: Convert to fraction form
   117,070.50/248,719.50 = 248,719.50/x
3. Step 3: Cross multiply
   117,070.50x = 248,719.50 × 248,719.50
4. Step 4: Simplify right side
   117,070.50x = 61,861,389,680.25
5. Step 5: Solve for x
   x = 61,861,389,680.25/117,070.50
6. Step 6: Final answer
   x = 528,411.42