Finding the Fourth Proportional to 19,152.72, 26,412.18 and 12,779.57

Step by Step Solution

1. Step 1: Write the proportion equation
   19,152.72 : 26,412.18 = 12,779.57 : x
2. Step 2: Convert to fraction form
   19,152.72/26,412.18 = 12,779.57/x
3. Step 3: Cross multiply
   19,152.72x = 26,412.18 × 12,779.57
4. Step 4: Simplify right side
   19,152.72x = 337,536,303.16
5. Step 5: Solve for x
   x = 337,536,303.16/19,152.72
6. Step 6: Final answer
   x = 17,623.41