Finding the Fourth Proportional to 12,985.02, 19,499.40 and 12,882.96

Step by Step Solution

1. Step 1: Write the proportion equation
   12,985.02 : 19,499.40 = 12,882.96 : x
2. Step 2: Convert to fraction form
   12,985.02/19,499.40 = 12,882.96/x
3. Step 3: Cross multiply
   12,985.02x = 19,499.40 × 12,882.96
4. Step 4: Simplify right side
   12,985.02x = 251,209,990.22
5. Step 5: Solve for x
   x = 251,209,990.22/12,985.02
6. Step 6: Final answer
   x = 19,346.14