Finding the Fourth Proportional to 120,005.18, 165,607.25 and 65,558.10

Step by Step Solution

1. Step 1: Write the proportion equation
   120,005.18 : 165,607.25 = 65,558.10 : x
2. Step 2: Convert to fraction form
   120,005.18/165,607.25 = 65,558.10/x
3. Step 3: Cross multiply
   120,005.18x = 165,607.25 × 65,558.10
4. Step 4: Simplify right side
   120,005.18x = 10,856,895,707.41
5. Step 5: Solve for x
   x = 10,856,895,707.41/120,005.18
6. Step 6: Final answer
   x = 90,470.22