Finding the Fourth Proportional to 70,072.47, 105,126.71 and 20,156.48

Step by Step Solution

1. Step 1: Write the proportion equation
   70,072.47 : 105,126.71 = 20,156.48 : x
2. Step 2: Convert to fraction form
   70,072.47/105,126.71 = 20,156.48/x
3. Step 3: Cross multiply
   70,072.47x = 105,126.71 × 20,156.48
4. Step 4: Simplify right side
   70,072.47x = 2,118,984,427.58
5. Step 5: Solve for x
   x = 2,118,984,427.58/70,072.47
6. Step 6: Final answer
   x = 30,239.90