Finding the Fourth Proportional to 52,407.61, 78,610.47 and 12,964.71

Step by Step Solution

1. Step 1: Write the proportion equation
   52,407.61 : 78,610.47 = 12,964.71 : x
2. Step 2: Convert to fraction form
   52,407.61/78,610.47 = 12,964.71/x
3. Step 3: Cross multiply
   52,407.61x = 78,610.47 × 12,964.71
4. Step 4: Simplify right side
   52,407.61x = 1,019,161,750.50
5. Step 5: Solve for x
   x = 1,019,161,750.50/52,407.61
6. Step 6: Final answer
   x = 19,446.83