Finding the Fourth Proportional to 42,991.51, 64,465.33 and 25,256.82

Step by Step Solution

1. Step 1: Write the proportion equation
   42,991.51 : 64,465.33 = 25,256.82 : x
2. Step 2: Convert to fraction form
   42,991.51/64,465.33 = 25,256.82/x
3. Step 3: Cross multiply
   42,991.51x = 64,465.33 × 25,256.82
4. Step 4: Simplify right side
   42,991.51x = 1,628,189,172.91
5. Step 5: Solve for x
   x = 1,628,189,172.91/42,991.51
6. Step 6: Final answer
   x = 37,872.34