Finding the Fourth Proportional to 13,061.60, 19,563.60 and 12,773.60

Step by Step Solution

1. Step 1: Write the proportion equation
   13,061.60 : 19,563.60 = 12,773.60 : x
2. Step 2: Convert to fraction form
   13,061.60/19,563.60 = 12,773.60/x
3. Step 3: Cross multiply
   13,061.60x = 19,563.60 × 12,773.60
4. Step 4: Simplify right side
   13,061.60x = 249,897,600.96
5. Step 5: Solve for x
   x = 249,897,600.96/13,061.60
6. Step 6: Final answer
   x = 19,132.24