Finding the Fourth Proportional to 70,072.55, 105,093.05 and 20,141.51

Step by Step Solution

1. Step 1: Write the proportion equation
   70,072.55 : 105,093.05 = 20,141.51 : x
2. Step 2: Convert to fraction form
   70,072.55/105,093.05 = 20,141.51/x
3. Step 3: Cross multiply
   70,072.55x = 105,093.05 × 20,141.51
4. Step 4: Simplify right side
   70,072.55x = 2,116,732,091.33
5. Step 5: Solve for x
   x = 2,116,732,091.33/70,072.55
6. Step 6: Final answer
   x = 30,207.72