Finding the Fourth Proportional to 102,907.82, 142,020.42 and 57,590.34

Step by Step Solution

1. Step 1: Write the proportion equation
   102,907.82 : 142,020.42 = 57,590.34 : x
2. Step 2: Convert to fraction form
   102,907.82/142,020.42 = 57,590.34/x
3. Step 3: Cross multiply
   102,907.82x = 142,020.42 × 57,590.34
4. Step 4: Simplify right side
   102,907.82x = 8,179,004,274.74
5. Step 5: Solve for x
   x = 8,179,004,274.74/102,907.82
6. Step 6: Final answer
   x = 79,478.94