Finding the Fourth Proportional to 55,301.56, 76,317.94 and 31,106.72

Step by Step Solution

1. Step 1: Write the proportion equation
   55,301.56 : 76,317.94 = 31,106.72 : x
2. Step 2: Convert to fraction form
   55,301.56/76,317.94 = 31,106.72/x
3. Step 3: Cross multiply
   55,301.56x = 76,317.94 × 31,106.72
4. Step 4: Simplify right side
   55,301.56x = 2,374,000,790.56
5. Step 5: Solve for x
   x = 2,374,000,790.56/55,301.56
6. Step 6: Final answer
   x = 42,928.28