Finding the Fourth Proportional to 140,518.30, 193,919.89 and 76,856.10

Step by Step Solution

1. Step 1: Write the proportion equation
   140,518.30 : 193,919.89 = 76,856.10 : x
2. Step 2: Convert to fraction form
   140,518.30/193,919.89 = 76,856.10/x
3. Step 3: Cross multiply
   140,518.30x = 193,919.89 × 76,856.10
4. Step 4: Simplify right side
   140,518.30x = 14,903,926,457.83
5. Step 5: Solve for x
   x = 14,903,926,457.83/140,518.30
6. Step 6: Final answer
   x = 106,063.95