Finding the Third Proportional to 249,066 and 389,152.50

Step by Step Solution

1. Step 1: Write the proportion equation
   249,066 : 389,152.50 = 389,152.50 : x
2. Step 2: Convert to fraction form
   249,066/389,152.50 = 389,152.50/x
3. Step 3: Cross multiply
   249,066x = 389,152.50 × 389,152.50
4. Step 4: Simplify right side
   249,066x = 151,439,668,256.25
5. Step 5: Solve for x
   x = 151,439,668,256.25/249,066
6. Step 6: Final answer
   x = 608,030.27