Finding the Fourth Proportional to 42,870.60, 59,164.56 and 25,879.01

Step by Step Solution

1. Step 1: Write the proportion equation
   42,870.60 : 59,164.56 = 25,879.01 : x
2. Step 2: Convert to fraction form
   42,870.60/59,164.56 = 25,879.01/x
3. Step 3: Cross multiply
   42,870.60x = 59,164.56 × 25,879.01
4. Step 4: Simplify right side
   42,870.60x = 1,531,119,944.06
5. Step 5: Solve for x
   x = 1,531,119,944.06/42,870.60
6. Step 6: Final answer
   x = 35,714.92