Finding the Fourth Proportional to 70,420.79, 105,630.18 and 17,113.16

Step by Step Solution

1. Step 1: Write the proportion equation
   70,420.79 : 105,630.18 = 17,113.16 : x
2. Step 2: Convert to fraction form
   70,420.79/105,630.18 = 17,113.16/x
3. Step 3: Cross multiply
   70,420.79x = 105,630.18 × 17,113.16
4. Step 4: Simplify right side
   70,420.79x = 1,807,665,643.02
5. Step 5: Solve for x
   x = 1,807,665,643.02/70,420.79
6. Step 6: Final answer
   x = 25,669.49