Finding the Fourth Proportional to 55,271.25, 76,266.62 and 31,068.78

Step by Step Solution

1. Step 1: Write the proportion equation
   55,271.25 : 76,266.62 = 31,068.78 : x
2. Step 2: Convert to fraction form
   55,271.25/76,266.62 = 31,068.78/x
3. Step 3: Cross multiply
   55,271.25x = 76,266.62 × 31,068.78
4. Step 4: Simplify right side
   55,271.25x = 2,369,510,682.78
5. Step 5: Solve for x
   x = 2,369,510,682.78/55,271.25
6. Step 6: Final answer
   x = 42,870.58