Finding the Fourth Proportional to 42,587.12, 63,861.48 and 13,008.56

Step by Step Solution

1. Step 1: Write the proportion equation
   42,587.12 : 63,861.48 = 13,008.56 : x
2. Step 2: Convert to fraction form
   42,587.12/63,861.48 = 13,008.56/x
3. Step 3: Cross multiply
   42,587.12x = 63,861.48 × 13,008.56
4. Step 4: Simplify right side
   42,587.12x = 830,745,894.27
5. Step 5: Solve for x
   x = 830,745,894.27/42,587.12
6. Step 6: Final answer
   x = 19,506.98