Finding the Fourth Proportional to 57,279.69, 85,925.34 and 19,839.69

Step by Step Solution

1. Step 1: Write the proportion equation
   57,279.69 : 85,925.34 = 19,839.69 : x
2. Step 2: Convert to fraction form
   57,279.69/85,925.34 = 19,839.69/x
3. Step 3: Cross multiply
   57,279.69x = 85,925.34 × 19,839.69
4. Step 4: Simplify right side
   57,279.69x = 1,704,732,108.74
5. Step 5: Solve for x
   x = 1,704,732,108.74/57,279.69
6. Step 6: Final answer
   x = 29,761.55