Finding the Fourth Proportional to 25,666.17, 35,419.59 and 15,055.98

Step by Step Solution

1. Step 1: Write the proportion equation
   25,666.17 : 35,419.59 = 15,055.98 : x
2. Step 2: Convert to fraction form
   25,666.17/35,419.59 = 15,055.98/x
3. Step 3: Cross multiply
   25,666.17x = 35,419.59 × 15,055.98
4. Step 4: Simplify right side
   25,666.17x = 533,276,563.37
5. Step 5: Solve for x
   x = 533,276,563.37/25,666.17
6. Step 6: Final answer
   x = 20,777.41