Finding the Fourth Proportional to 30,438.29, 42,031.56 and 19,127.39

Step by Step Solution

1. Step 1: Write the proportion equation
   30,438.29 : 42,031.56 = 19,127.39 : x
2. Step 2: Convert to fraction form
   30,438.29/42,031.56 = 19,127.39/x
3. Step 3: Cross multiply
   30,438.29x = 42,031.56 × 19,127.39
4. Step 4: Simplify right side
   30,438.29x = 803,953,830.27
5. Step 5: Solve for x
   x = 803,953,830.27/30,438.29
6. Step 6: Final answer
   x = 26,412.59