Finding the Fourth Proportional to 58,788.31, 81,128.46 and 31,931.34

Step by Step Solution

1. Step 1: Write the proportion equation
   58,788.31 : 81,128.46 = 31,931.34 : x
2. Step 2: Convert to fraction form
   58,788.31/81,128.46 = 31,931.34/x
3. Step 3: Cross multiply
   58,788.31x = 81,128.46 × 31,931.34
4. Step 4: Simplify right side
   58,788.31x = 2,590,540,117.37
5. Step 5: Solve for x
   x = 2,590,540,117.37/58,788.31
6. Step 6: Final answer
   x = 44,065.57