Finding the Third Proportional to 309,659.63 and 436,071.94

Step by Step Solution

1. Step 1: Write the proportion equation
   309,659.63 : 436,071.94 = 436,071.94 : x
2. Step 2: Convert to fraction form
   309,659.63/436,071.94 = 436,071.94/x
3. Step 3: Cross multiply
   309,659.63x = 436,071.94 × 436,071.94
4. Step 4: Simplify right side
   309,659.63x = 190,158,734,675.00
5. Step 5: Solve for x
   x = 190,158,734,675.00/309,659.63
6. Step 6: Final answer
   x = 614,089.53