Finding the Fourth Proportional to 31,167.86, 43,023.56 and 21,148.16

Step by Step Solution

1. Step 1: Write the proportion equation
   31,167.86 : 43,023.56 = 21,148.16 : x
2. Step 2: Convert to fraction form
   31,167.86/43,023.56 = 21,148.16/x
3. Step 3: Cross multiply
   31,167.86x = 43,023.56 × 21,148.16
4. Step 4: Simplify right side
   31,167.86x = 909,868,809.79
5. Step 5: Solve for x
   x = 909,868,809.79/31,167.86
6. Step 6: Final answer
   x = 29,192.54