Finding the Fourth Proportional to 120,196.58, 180,321.52 and 45,317.38

Step by Step Solution

1. Step 1: Write the proportion equation
   120,196.58 : 180,321.52 = 45,317.38 : x
2. Step 2: Convert to fraction form
   120,196.58/180,321.52 = 45,317.38/x
3. Step 3: Cross multiply
   120,196.58x = 180,321.52 × 45,317.38
4. Step 4: Simplify right side
   120,196.58x = 8,171,698,844.02
5. Step 5: Solve for x
   x = 8,171,698,844.02/120,196.58
6. Step 6: Final answer
   x = 67,986.12