Finding the Fourth Proportional to 42,155.18, 63,214.32 and 12,567.12

Step by Step Solution

1. Step 1: Write the proportion equation
   42,155.18 : 63,214.32 = 12,567.12 : x
2. Step 2: Convert to fraction form
   42,155.18/63,214.32 = 12,567.12/x
3. Step 3: Cross multiply
   42,155.18x = 63,214.32 × 12,567.12
4. Step 4: Simplify right side
   42,155.18x = 794,422,288.60
5. Step 5: Solve for x
   x = 794,422,288.60/42,155.18
6. Step 6: Final answer
   x = 18,845.19