Finding the Fourth Proportional to 31,354.89, 43,290.01 and 19,430.88

Step by Step Solution

1. Step 1: Write the proportion equation
   31,354.89 : 43,290.01 = 19,430.88 : x
2. Step 2: Convert to fraction form
   31,354.89/43,290.01 = 19,430.88/x
3. Step 3: Cross multiply
   31,354.89x = 43,290.01 × 19,430.88
4. Step 4: Simplify right side
   31,354.89x = 841,162,989.51
5. Step 5: Solve for x
   x = 841,162,989.51/31,354.89
6. Step 6: Final answer
   x = 26,827.17