Finding the Fourth Proportional to 42,987.57, 64,548.77 and 36,410.28

Step by Step Solution

1. Step 1: Write the proportion equation
   42,987.57 : 64,548.77 = 36,410.28 : x
2. Step 2: Convert to fraction form
   42,987.57/64,548.77 = 36,410.28/x
3. Step 3: Cross multiply
   42,987.57x = 64,548.77 × 36,410.28
4. Step 4: Simplify right side
   42,987.57x = 2,350,238,607.30
5. Step 5: Solve for x
   x = 2,350,238,607.30/42,987.57
6. Step 6: Final answer
   x = 54,672.52