Finding the Fourth Proportional to 37,780.77, 52,139.67 and 21,870.75

Step by Step Solution

1. Step 1: Write the proportion equation
   37,780.77 : 52,139.67 = 21,870.75 : x
2. Step 2: Convert to fraction form
   37,780.77/52,139.67 = 21,870.75/x
3. Step 3: Cross multiply
   37,780.77x = 52,139.67 × 21,870.75
4. Step 4: Simplify right side
   37,780.77x = 1,140,333,687.65
5. Step 5: Solve for x
   x = 1,140,333,687.65/37,780.77
6. Step 6: Final answer
   x = 30,182.91