Finding the Fourth Proportional to 70,602.49, 105,954.72 and 40,980.79

Step by Step Solution

1. Step 1: Write the proportion equation
   70,602.49 : 105,954.72 = 40,980.79 : x
2. Step 2: Convert to fraction form
   70,602.49/105,954.72 = 40,980.79/x
3. Step 3: Cross multiply
   70,602.49x = 105,954.72 × 40,980.79
4. Step 4: Simplify right side
   70,602.49x = 4,342,108,129.83
5. Step 5: Solve for x
   x = 4,342,108,129.83/70,602.49
6. Step 6: Final answer
   x = 61,500.78