Finding the Fourth Proportional to 142,429.50, 196,493.32 and 81,985.68

Step by Step Solution

1. Step 1: Write the proportion equation
   142,429.50 : 196,493.32 = 81,985.68 : x
2. Step 2: Convert to fraction form
   142,429.50/196,493.32 = 81,985.68/x
3. Step 3: Cross multiply
   142,429.50x = 196,493.32 × 81,985.68
4. Step 4: Simplify right side
   142,429.50x = 16,109,638,455.66
5. Step 5: Solve for x
   x = 16,109,638,455.66/142,429.50
6. Step 6: Final answer
   x = 113,106.05