Finding the Fourth Proportional to 42,111.45, 63,166.64 and 12,126.42

Step by Step Solution

1. Step 1: Write the proportion equation
   42,111.45 : 63,166.64 = 12,126.42 : x
2. Step 2: Convert to fraction form
   42,111.45/63,166.64 = 12,126.42/x
3. Step 3: Cross multiply
   42,111.45x = 63,166.64 × 12,126.42
4. Step 4: Simplify right side
   42,111.45x = 765,985,146.00
5. Step 5: Solve for x
   x = 765,985,146.00/42,111.45
6. Step 6: Final answer
   x = 18,189.47