Finding the Fourth Proportional to 42,259.46, 63,399.72 and 12,677.88

Step by Step Solution

1. Step 1: Write the proportion equation
   42,259.46 : 63,399.72 = 12,677.88 : x
2. Step 2: Convert to fraction form
   42,259.46/63,399.72 = 12,677.88/x
3. Step 3: Cross multiply
   42,259.46x = 63,399.72 × 12,677.88
4. Step 4: Simplify right side
   42,259.46x = 803,774,042.19
5. Step 5: Solve for x
   x = 803,774,042.19/42,259.46
6. Step 6: Final answer
   x = 19,019.98