Finding the Fourth Proportional to 37,780.59, 52,137.26 and 21,013.59

Step by Step Solution

1. Step 1: Write the proportion equation
   37,780.59 : 52,137.26 = 21,013.59 : x
2. Step 2: Convert to fraction form
   37,780.59/52,137.26 = 21,013.59/x
3. Step 3: Cross multiply
   37,780.59x = 52,137.26 × 21,013.59
4. Step 4: Simplify right side
   37,780.59x = 1,095,590,900.30
5. Step 5: Solve for x
   x = 1,095,590,900.30/37,780.59
6. Step 6: Final answer
   x = 28,998.78