Finding the Fourth Proportional to 55,298, 76,308.78 and 31,426.88

Step by Step Solution

1. Step 1: Write the proportion equation
   55,298 : 76,308.78 = 31,426.88 : x
2. Step 2: Convert to fraction form
   55,298/76,308.78 = 31,426.88/x
3. Step 3: Cross multiply
   55,298x = 76,308.78 × 31,426.88
4. Step 4: Simplify right side
   55,298x = 2,398,146,872.01
5. Step 5: Solve for x
   x = 2,398,146,872.01/55,298
6. Step 6: Final answer
   x = 43,367.70