Finding the Fourth Proportional to 39,085.95, 58,641.48 and 12,784.71

Step by Step Solution

1. Step 1: Write the proportion equation
   39,085.95 : 58,641.48 = 12,784.71 : x
2. Step 2: Convert to fraction form
   39,085.95/58,641.48 = 12,784.71/x
3. Step 3: Cross multiply
   39,085.95x = 58,641.48 × 12,784.71
4. Step 4: Simplify right side
   39,085.95x = 749,714,315.77
5. Step 5: Solve for x
   x = 749,714,315.77/39,085.95
6. Step 6: Final answer
   x = 19,181.17