Finding the Fourth Proportional to 52,196.76, 78,278.58 and 17,128.26

Step by Step Solution

1. Step 1: Write the proportion equation
   52,196.76 : 78,278.58 = 17,128.26 : x
2. Step 2: Convert to fraction form
   52,196.76/78,278.58 = 17,128.26/x
3. Step 3: Cross multiply
   52,196.76x = 78,278.58 × 17,128.26
4. Step 4: Simplify right side
   52,196.76x = 1,340,775,870.67
5. Step 5: Solve for x
   x = 1,340,775,870.67/52,196.76
6. Step 6: Final answer
   x = 25,686.96