Finding the Fourth Proportional to 52,061.23, 78,091.15 and 12,618.69

Step by Step Solution

1. Step 1: Write the proportion equation
   52,061.23 : 78,091.15 = 12,618.69 : x
2. Step 2: Convert to fraction form
   52,061.23/78,091.15 = 12,618.69/x
3. Step 3: Cross multiply
   52,061.23x = 78,091.15 × 12,618.69
4. Step 4: Simplify right side
   52,061.23x = 985,408,013.59
5. Step 5: Solve for x
   x = 985,408,013.59/52,061.23
6. Step 6: Final answer
   x = 18,927.87