Finding the Fourth Proportional to 57,690.51, 86,484.33 and 31,050.81

Step by Step Solution

1. Step 1: Write the proportion equation
   57,690.51 : 86,484.33 = 31,050.81 : x
2. Step 2: Convert to fraction form
   57,690.51/86,484.33 = 31,050.81/x
3. Step 3: Cross multiply
   57,690.51x = 86,484.33 × 31,050.81
4. Step 4: Simplify right side
   57,690.51x = 2,685,408,498.81
5. Step 5: Solve for x
   x = 2,685,408,498.81/57,690.51
6. Step 6: Final answer
   x = 46,548.53