Finding the Fourth Proportional to 53,501.25, 79,900.56 and 42,987.27

Step by Step Solution

1. Step 1: Write the proportion equation
   53,501.25 : 79,900.56 = 42,987.27 : x
2. Step 2: Convert to fraction form
   53,501.25/79,900.56 = 42,987.27/x
3. Step 3: Cross multiply
   53,501.25x = 79,900.56 × 42,987.27
4. Step 4: Simplify right side
   53,501.25x = 3,434,706,945.87
5. Step 5: Solve for x
   x = 3,434,706,945.87/53,501.25
6. Step 6: Final answer
   x = 64,198.63