Finding the Fourth Proportional to 70,742.52, 106,077.25 and 20,816.12

Step by Step Solution

1. Step 1: Write the proportion equation
   70,742.52 : 106,077.25 = 20,816.12 : x
2. Step 2: Convert to fraction form
   70,742.52/106,077.25 = 20,816.12/x
3. Step 3: Cross multiply
   70,742.52x = 106,077.25 × 20,816.12
4. Step 4: Simplify right side
   70,742.52x = 2,208,116,661.19
5. Step 5: Solve for x
   x = 2,208,116,661.19/70,742.52
6. Step 6: Final answer
   x = 31,213.43