Finding the Fourth Proportional to 52,305, 78,456.80 and 12,862.45

Step by Step Solution

1. Step 1: Write the proportion equation
   52,305 : 78,456.80 = 12,862.45 : x
2. Step 2: Convert to fraction form
   52,305/78,456.80 = 12,862.45/x
3. Step 3: Cross multiply
   52,305x = 78,456.80 × 12,862.45
4. Step 4: Simplify right side
   52,305x = 1,009,146,667.16
5. Step 5: Solve for x
   x = 1,009,146,667.16/52,305
6. Step 6: Final answer
   x = 19,293.50