Finding the Fourth Proportional to 70,071.37, 105,095.76 and 20,140.09

Step by Step Solution

1. Step 1: Write the proportion equation
   70,071.37 : 105,095.76 = 20,140.09 : x
2. Step 2: Convert to fraction form
   70,071.37/105,095.76 = 20,140.09/x
3. Step 3: Cross multiply
   70,071.37x = 105,095.76 × 20,140.09
4. Step 4: Simplify right side
   70,071.37x = 2,116,638,065.02
5. Step 5: Solve for x
   x = 2,116,638,065.02/70,071.37
6. Step 6: Final answer
   x = 30,206.89