Finding the Fourth Proportional to 129,874.01, 194,830.49 and 45,619.31

Step by Step Solution

1. Step 1: Write the proportion equation
   129,874.01 : 194,830.49 = 45,619.31 : x
2. Step 2: Convert to fraction form
   129,874.01/194,830.49 = 45,619.31/x
3. Step 3: Cross multiply
   129,874.01x = 194,830.49 × 45,619.31
4. Step 4: Simplify right side
   129,874.01x = 8,888,033,121.89
5. Step 5: Solve for x
   x = 8,888,033,121.89/129,874.01
6. Step 6: Final answer
   x = 68,435.81