Finding the Fourth Proportional to 42,730.56, 64,118.79 and 17,787.83

Step by Step Solution

1. Step 1: Write the proportion equation
   42,730.56 : 64,118.79 = 17,787.83 : x
2. Step 2: Convert to fraction form
   42,730.56/64,118.79 = 17,787.83/x
3. Step 3: Cross multiply
   42,730.56x = 64,118.79 × 17,787.83
4. Step 4: Simplify right side
   42,730.56x = 1,140,533,815.73
5. Step 5: Solve for x
   x = 1,140,533,815.73/42,730.56
6. Step 6: Final answer
   x = 26,691.29