Finding the Fourth Proportional to 109,426.55, 164,074.10 and 42,787.28

Step by Step Solution

1. Step 1: Write the proportion equation
   109,426.55 : 164,074.10 = 42,787.28 : x
2. Step 2: Convert to fraction form
   109,426.55/164,074.10 = 42,787.28/x
3. Step 3: Cross multiply
   109,426.55x = 164,074.10 × 42,787.28
4. Step 4: Simplify right side
   109,426.55x = 7,020,284,653.70
5. Step 5: Solve for x
   x = 7,020,284,653.70/109,426.55
6. Step 6: Final answer
   x = 64,155.23