Finding the Fourth Proportional to 52,389.57, 78,583.59 and 12,946.69

Step by Step Solution

1. Step 1: Write the proportion equation
   52,389.57 : 78,583.59 = 12,946.69 : x
2. Step 2: Convert to fraction form
   52,389.57/78,583.59 = 12,946.69/x
3. Step 3: Cross multiply
   52,389.57x = 78,583.59 × 12,946.69
4. Step 4: Simplify right side
   52,389.57x = 1,017,396,985.90
5. Step 5: Solve for x
   x = 1,017,396,985.90/52,389.57
6. Step 6: Final answer
   x = 19,419.84