Finding the Fourth Proportional to 28,527.30, 42,755.31 and 19,691.82

Step by Step Solution

1. Step 1: Write the proportion equation
   28,527.30 : 42,755.31 = 19,691.82 : x
2. Step 2: Convert to fraction form
   28,527.30/42,755.31 = 19,691.82/x
3. Step 3: Cross multiply
   28,527.30x = 42,755.31 × 19,691.82
4. Step 4: Simplify right side
   28,527.30x = 841,929,868.56
5. Step 5: Solve for x
   x = 841,929,868.56/28,527.30
6. Step 6: Final answer
   x = 29,513.13