Finding the Fourth Proportional to 140,981.96, 211,405.98 and 81,835.76

Step by Step Solution

1. Step 1: Write the proportion equation
   140,981.96 : 211,405.98 = 81,835.76 : x
2. Step 2: Convert to fraction form
   140,981.96/211,405.98 = 81,835.76/x
3. Step 3: Cross multiply
   140,981.96x = 211,405.98 × 81,835.76
4. Step 4: Simplify right side
   140,981.96x = 17,300,569,041.84
5. Step 5: Solve for x
   x = 17,300,569,041.84/140,981.96
6. Step 6: Final answer
   x = 122,714.77