Finding the Fourth Proportional to 37,784.51, 56,664.68 and 12,478.39

Step by Step Solution

1. Step 1: Write the proportion equation
   37,784.51 : 56,664.68 = 12,478.39 : x
2. Step 2: Convert to fraction form
   37,784.51/56,664.68 = 12,478.39/x
3. Step 3: Cross multiply
   37,784.51x = 56,664.68 × 12,478.39
4. Step 4: Simplify right side
   37,784.51x = 707,083,976.27
5. Step 5: Solve for x
   x = 707,083,976.27/37,784.51
6. Step 6: Final answer
   x = 18,713.59