Finding the Third Proportional to 685,506,109.50 and 1,044,321,140.25

Step by Step Solution

1. Step 1: Write the proportion equation
   685,506,109.50 : 1,044,321,140.25 = 1,044,321,140.25 : x
2. Step 2: Convert to fraction form
   685,506,109.50/1,044,321,140.25 = 1,044,321,140.25/x
3. Step 3: Cross multiply
   685,506,109.50x = 1,044,321,140.25 × 1,044,321,140.25
4. Step 4: Simplify right side
   685,506,109.50x = 1,090,606,643,973,060,224
5. Step 5: Solve for x
   x = 1,090,606,643,973,060,224/685,506,109.50
6. Step 6: Final answer
   x = 1,590,951,019.78