Finding the Third Proportional to 342,051 and 515,128.50

Step by Step Solution

1. Step 1: Write the proportion equation
   342,051 : 515,128.50 = 515,128.50 : x
2. Step 2: Convert to fraction form
   342,051/515,128.50 = 515,128.50/x
3. Step 3: Cross multiply
   342,051x = 515,128.50 × 515,128.50
4. Step 4: Simplify right side
   342,051x = 265,357,371,512.25
5. Step 5: Solve for x
   x = 265,357,371,512.25/342,051
6. Step 6: Final answer
   x = 775,783.06