Finding the Third Proportional to 34,690.78 and 74,643.89

Step by Step Solution

1. Step 1: Write the proportion equation
   34,690.78 : 74,643.89 = 74,643.89 : x
2. Step 2: Convert to fraction form
   34,690.78/74,643.89 = 74,643.89/x
3. Step 3: Cross multiply
   34,690.78x = 74,643.89 × 74,643.89
4. Step 4: Simplify right side
   34,690.78x = 5,571,710,407.64
5. Step 5: Solve for x
   x = 5,571,710,407.64/34,690.78
6. Step 6: Final answer
   x = 160,610.69