Finding the Fourth Proportional to 199,820.96, 299,748.72 and 81,500.48

Step by Step Solution

1. Step 1: Write the proportion equation
   199,820.96 : 299,748.72 = 81,500.48 : x
2. Step 2: Convert to fraction form
   199,820.96/299,748.72 = 81,500.48/x
3. Step 3: Cross multiply
   199,820.96x = 299,748.72 × 81,500.48
4. Step 4: Simplify right side
   199,820.96x = 24,429,664,559.39
5. Step 5: Solve for x
   x = 24,429,664,559.39/199,820.96
6. Step 6: Final answer
   x = 122,257.77