Finding the Fourth Proportional to 105,271.74, 145,268.88 and 57,525.48

Step by Step Solution

1. Step 1: Write the proportion equation
   105,271.74 : 145,268.88 = 57,525.48 : x
2. Step 2: Convert to fraction form
   105,271.74/145,268.88 = 57,525.48/x
3. Step 3: Cross multiply
   105,271.74x = 145,268.88 × 57,525.48
4. Step 4: Simplify right side
   105,271.74x = 8,356,662,051.06
5. Step 5: Solve for x
   x = 8,356,662,051.06/105,271.74
6. Step 6: Final answer
   x = 79,381.82