Finding the Fourth Proportional to 31,131.93, 42,971.27 and 21,703.53

Step by Step Solution

1. Step 1: Write the proportion equation
   31,131.93 : 42,971.27 = 21,703.53 : x
2. Step 2: Convert to fraction form
   31,131.93/42,971.27 = 21,703.53/x
3. Step 3: Cross multiply
   31,131.93x = 42,971.27 × 21,703.53
4. Step 4: Simplify right side
   31,131.93x = 932,628,139.07
5. Step 5: Solve for x
   x = 932,628,139.07/31,131.93
6. Step 6: Final answer
   x = 29,957.29