Finding the Fourth Proportional to 42,370.34, 63,555.93 and 12,788.42

Step by Step Solution

1. Step 1: Write the proportion equation
   42,370.34 : 63,555.93 = 12,788.42 : x
2. Step 2: Convert to fraction form
   42,370.34/63,555.93 = 12,788.42/x
3. Step 3: Cross multiply
   42,370.34x = 63,555.93 × 12,788.42
4. Step 4: Simplify right side
   42,370.34x = 812,779,926.33
5. Step 5: Solve for x
   x = 812,779,926.33/42,370.34
6. Step 6: Final answer
   x = 19,182.76