Finding the Fourth Proportional to 42,442.10, 63,669.74 and 12,852.89

Step by Step Solution

1. Step 1: Write the proportion equation
   42,442.10 : 63,669.74 = 12,852.89 : x
2. Step 2: Convert to fraction form
   42,442.10/63,669.74 = 12,852.89/x
3. Step 3: Cross multiply
   42,442.10x = 63,669.74 × 12,852.89
4. Step 4: Simplify right side
   42,442.10x = 818,339,781.94
5. Step 5: Solve for x
   x = 818,339,781.94/42,442.10
6. Step 6: Final answer
   x = 19,281.32