Finding the Fourth Proportional to 37,783.12, 52,140.71 and 20,787

Step by Step Solution

1. Step 1: Write the proportion equation
   37,783.12 : 52,140.71 = 20,787 : x
2. Step 2: Convert to fraction form
   37,783.12/52,140.71 = 20,787/x
3. Step 3: Cross multiply
   37,783.12x = 52,140.71 × 20,787
4. Step 4: Simplify right side
   37,783.12x = 1,083,848,834.84
5. Step 5: Solve for x
   x = 1,083,848,834.84/37,783.12
6. Step 6: Final answer
   x = 28,686.06