Finding the Third Proportional to 138,783.63 and 302,666.50

Step by Step Solution

1. Step 1: Write the proportion equation
   138,783.63 : 302,666.50 = 302,666.50 : x
2. Step 2: Convert to fraction form
   138,783.63/302,666.50 = 302,666.50/x
3. Step 3: Cross multiply
   138,783.63x = 302,666.50 × 302,666.50
4. Step 4: Simplify right side
   138,783.63x = 91,607,010,222.25
5. Step 5: Solve for x
   x = 91,607,010,222.25/138,783.63
6. Step 6: Final answer
   x = 660,070.74