Finding the Fourth Proportional to 30,876.67, 46,314.69 and 8,690.05

Step by Step Solution

1. Step 1: Write the proportion equation
   30,876.67 : 46,314.69 = 8,690.05 : x
2. Step 2: Convert to fraction form
   30,876.67/46,314.69 = 8,690.05/x
3. Step 3: Cross multiply
   30,876.67x = 46,314.69 × 8,690.05
4. Step 4: Simplify right side
   30,876.67x = 402,476,971.83
5. Step 5: Solve for x
   x = 402,476,971.83/30,876.67
6. Step 6: Final answer
   x = 13,034.99