Finding the Fourth Proportional to 19,978.16, 29,815.33 and 17,763.88

Step by Step Solution

1. Step 1: Write the proportion equation
   19,978.16 : 29,815.33 = 17,763.88 : x
2. Step 2: Convert to fraction form
   19,978.16/29,815.33 = 17,763.88/x
3. Step 3: Cross multiply
   19,978.16x = 29,815.33 × 17,763.88
4. Step 4: Simplify right side
   19,978.16x = 529,635,944.28
5. Step 5: Solve for x
   x = 529,635,944.28/19,978.16
6. Step 6: Final answer
   x = 26,510.75