Finding the Fourth Proportional to 105,499.29, 145,592.46 and 57,752.64

Step by Step Solution

1. Step 1: Write the proportion equation
   105,499.29 : 145,592.46 = 57,752.64 : x
2. Step 2: Convert to fraction form
   105,499.29/145,592.46 = 57,752.64/x
3. Step 3: Cross multiply
   105,499.29x = 145,592.46 × 57,752.64
4. Step 4: Simplify right side
   105,499.29x = 8,408,348,929.09
5. Step 5: Solve for x
   x = 8,408,348,929.09/105,499.29
6. Step 6: Final answer
   x = 79,700.53