Finding the Fourth Proportional to 52,570.27, 78,855 and 13,127.12

Step by Step Solution

1. Step 1: Write the proportion equation
   52,570.27 : 78,855 = 13,127.12 : x
2. Step 2: Convert to fraction form
   52,570.27/78,855 = 13,127.12/x
3. Step 3: Cross multiply
   52,570.27x = 78,855 × 13,127.12
4. Step 4: Simplify right side
   52,570.27x = 1,035,139,047.60
5. Step 5: Solve for x
   x = 1,035,139,047.60/52,570.27
6. Step 6: Final answer
   x = 19,690.58