Finding the Fourth Proportional to 105,662.34, 145,808.91 and 57,907.17

Step by Step Solution

1. Step 1: Write the proportion equation
   105,662.34 : 145,808.91 = 57,907.17 : x
2. Step 2: Convert to fraction form
   105,662.34/145,808.91 = 57,907.17/x
3. Step 3: Cross multiply
   105,662.34x = 145,808.91 × 57,907.17
4. Step 4: Simplify right side
   105,662.34x = 8,443,381,338.88
5. Step 5: Solve for x
   x = 8,443,381,338.88/105,662.34
6. Step 6: Final answer
   x = 79,909.09