Finding the Fourth Proportional to 42,787.82, 64,155 and 16,461.20

Step by Step Solution

1. Step 1: Write the proportion equation
   42,787.82 : 64,155 = 16,461.20 : x
2. Step 2: Convert to fraction form
   42,787.82/64,155 = 16,461.20/x
3. Step 3: Cross multiply
   42,787.82x = 64,155 × 16,461.20
4. Step 4: Simplify right side
   42,787.82x = 1,056,068,286
5. Step 5: Solve for x
   x = 1,056,068,286/42,787.82
6. Step 6: Final answer
   x = 24,681.52