Finding the Fourth Proportional to 42,308.26, 63,464.01 and 12,730.30

Step by Step Solution

1. Step 1: Write the proportion equation
   42,308.26 : 63,464.01 = 12,730.30 : x
2. Step 2: Convert to fraction form
   42,308.26/63,464.01 = 12,730.30/x
3. Step 3: Cross multiply
   42,308.26x = 63,464.01 × 12,730.30
4. Step 4: Simplify right side
   42,308.26x = 807,915,886.50
5. Step 5: Solve for x
   x = 807,915,886.50/42,308.26
6. Step 6: Final answer
   x = 19,095.94