Finding the Fourth Proportional to 42,805.48, 64,196.70 and 15,099.88

Step by Step Solution

1. Step 1: Write the proportion equation
   42,805.48 : 64,196.70 = 15,099.88 : x
2. Step 2: Convert to fraction form
   42,805.48/64,196.70 = 15,099.88/x
3. Step 3: Cross multiply
   42,805.48x = 64,196.70 × 15,099.88
4. Step 4: Simplify right side
   42,805.48x = 969,362,466.40
5. Step 5: Solve for x
   x = 969,362,466.40/42,805.48
6. Step 6: Final answer
   x = 22,645.76