Finding the Fourth Proportional to 67,120.21, 100,677.99 and 17,200.72

Step by Step Solution

1. Step 1: Write the proportion equation
   67,120.21 : 100,677.99 = 17,200.72 : x
2. Step 2: Convert to fraction form
   67,120.21/100,677.99 = 17,200.72/x
3. Step 3: Cross multiply
   67,120.21x = 100,677.99 × 17,200.72
4. Step 4: Simplify right side
   67,120.21x = 1,731,733,916.15
5. Step 5: Solve for x
   x = 1,731,733,916.15/67,120.21
6. Step 6: Final answer
   x = 25,800.48