Finding the Fourth Proportional to 42,613.96, 63,918.52 and 13,031.76

Step by Step Solution

1. Step 1: Write the proportion equation
   42,613.96 : 63,918.52 = 13,031.76 : x
2. Step 2: Convert to fraction form
   42,613.96/63,918.52 = 13,031.76/x
3. Step 3: Cross multiply
   42,613.96x = 63,918.52 × 13,031.76
4. Step 4: Simplify right side
   42,613.96x = 832,970,812.20
5. Step 5: Solve for x
   x = 832,970,812.20/42,613.96
6. Step 6: Final answer
   x = 19,546.90