Finding the Fourth Proportional to 42,897.67, 64,324.56 and 17,930.91

Step by Step Solution

1. Step 1: Write the proportion equation
   42,897.67 : 64,324.56 = 17,930.91 : x
2. Step 2: Convert to fraction form
   42,897.67/64,324.56 = 17,930.91/x
3. Step 3: Cross multiply
   42,897.67x = 64,324.56 × 17,930.91
4. Step 4: Simplify right side
   42,897.67x = 1,153,397,896.15
5. Step 5: Solve for x
   x = 1,153,397,896.15/42,897.67
6. Step 6: Final answer
   x = 26,887.19