Finding the Fourth Proportional to 42,530.32, 63,793.32 and 12,947.50

Step by Step Solution

1. Step 1: Write the proportion equation
   42,530.32 : 63,793.32 = 12,947.50 : x
2. Step 2: Convert to fraction form
   42,530.32/63,793.32 = 12,947.50/x
3. Step 3: Cross multiply
   42,530.32x = 63,793.32 × 12,947.50
4. Step 4: Simplify right side
   42,530.32x = 825,964,010.70
5. Step 5: Solve for x
   x = 825,964,010.70/42,530.32
6. Step 6: Final answer
   x = 19,420.59