Finding the Fourth Proportional to 142,379.46, 196,427.15 and 81,917.57

Step by Step Solution

1. Step 1: Write the proportion equation
   142,379.46 : 196,427.15 = 81,917.57 : x
2. Step 2: Convert to fraction form
   142,379.46/196,427.15 = 81,917.57/x
3. Step 3: Cross multiply
   142,379.46x = 196,427.15 × 81,917.57
4. Step 4: Simplify right side
   142,379.46x = 16,090,834,810.03
5. Step 5: Solve for x
   x = 16,090,834,810.03/142,379.46
6. Step 6: Final answer
   x = 113,013.74