Finding the Fourth Proportional to 129,647.35, 194,499.59 and 39,690.74

Step by Step Solution

1. Step 1: Write the proportion equation
   129,647.35 : 194,499.59 = 39,690.74 : x
2. Step 2: Convert to fraction form
   129,647.35/194,499.59 = 39,690.74/x
3. Step 3: Cross multiply
   129,647.35x = 194,499.59 × 39,690.74
4. Step 4: Simplify right side
   129,647.35x = 7,719,833,167.85
5. Step 5: Solve for x
   x = 7,719,833,167.85/129,647.35
6. Step 6: Final answer
   x = 59,544.86