Finding the Fourth Proportional to 42,855.22, 64,298.22 and 19,160.76

Step by Step Solution

1. Step 1: Write the proportion equation
   42,855.22 : 64,298.22 = 19,160.76 : x
2. Step 2: Convert to fraction form
   42,855.22/64,298.22 = 19,160.76/x
3. Step 3: Cross multiply
   42,855.22x = 64,298.22 × 19,160.76
4. Step 4: Simplify right side
   42,855.22x = 1,232,002,761.85
5. Step 5: Solve for x
   x = 1,232,002,761.85/42,855.22
6. Step 6: Final answer
   x = 28,748.02