Finding the Fourth Proportional to 42,072.42, 63,114.91 and 12,486.76

Step by Step Solution

1. Step 1: Write the proportion equation
   42,072.42 : 63,114.91 = 12,486.76 : x
2. Step 2: Convert to fraction form
   42,072.42/63,114.91 = 12,486.76/x
3. Step 3: Cross multiply
   42,072.42x = 63,114.91 × 12,486.76
4. Step 4: Simplify right side
   42,072.42x = 788,100,733.59
5. Step 5: Solve for x
   x = 788,100,733.59/42,072.42
6. Step 6: Final answer
   x = 18,732.00