Finding the Third Proportional to 342,699 and 742,543.50

Step by Step Solution

1. Step 1: Write the proportion equation
   342,699 : 742,543.50 = 742,543.50 : x
2. Step 2: Convert to fraction form
   342,699/742,543.50 = 742,543.50/x
3. Step 3: Cross multiply
   342,699x = 742,543.50 × 742,543.50
4. Step 4: Simplify right side
   342,699x = 551,370,849,392.25
5. Step 5: Solve for x
   x = 551,370,849,392.25/342,699
6. Step 6: Final answer
   x = 1,608,907.09