Finding the Fourth Proportional to 37,781.84, 52,139.64 and 20,786.72

Step by Step Solution

1. Step 1: Write the proportion equation
   37,781.84 : 52,139.64 = 20,786.72 : x
2. Step 2: Convert to fraction form
   37,781.84/52,139.64 = 20,786.72/x
3. Step 3: Cross multiply
   37,781.84x = 52,139.64 × 20,786.72
4. Step 4: Simplify right side
   37,781.84x = 1,083,812,097.58
5. Step 5: Solve for x
   x = 1,083,812,097.58/37,781.84
6. Step 6: Final answer
   x = 28,686.06