Finding the Fourth Proportional to 31,107.51, 42,914.79 and 21,032.37

Step by Step Solution

1. Step 1: Write the proportion equation
   31,107.51 : 42,914.79 = 21,032.37 : x
2. Step 2: Convert to fraction form
   31,107.51/42,914.79 = 21,032.37/x
3. Step 3: Cross multiply
   31,107.51x = 42,914.79 × 21,032.37
4. Step 4: Simplify right side
   31,107.51x = 902,599,741.75
5. Step 5: Solve for x
   x = 902,599,741.75/31,107.51
6. Step 6: Final answer
   x = 29,015.49