Finding the Fourth Proportional to 39,086.19, 58,617 and 12,784.77

Step by Step Solution

1. Step 1: Write the proportion equation
   39,086.19 : 58,617 = 12,784.77 : x
2. Step 2: Convert to fraction form
   39,086.19/58,617 = 12,784.77/x
3. Step 3: Cross multiply
   39,086.19x = 58,617 × 12,784.77
4. Step 4: Simplify right side
   39,086.19x = 749,404,863.09
5. Step 5: Solve for x
   x = 749,404,863.09/39,086.19
6. Step 6: Final answer
   x = 19,173.14