Finding the Fourth Proportional to 42,320.57, 63,484.69 and 11,155.82

Step by Step Solution

1. Step 1: Write the proportion equation
   42,320.57 : 63,484.69 = 11,155.82 : x
2. Step 2: Convert to fraction form
   42,320.57/63,484.69 = 11,155.82/x
3. Step 3: Cross multiply
   42,320.57x = 63,484.69 × 11,155.82
4. Step 4: Simplify right side
   42,320.57x = 708,223,774.40
5. Step 5: Solve for x
   x = 708,223,774.40/42,320.57
6. Step 6: Final answer
   x = 16,734.74