Finding the Fourth Proportional to 28,555.02, 42,824.31 and 9,834.30

Step by Step Solution

1. Step 1: Write the proportion equation
   28,555.02 : 42,824.31 = 9,834.30 : x
2. Step 2: Convert to fraction form
   28,555.02/42,824.31 = 9,834.30/x
3. Step 3: Cross multiply
   28,555.02x = 42,824.31 × 9,834.30
4. Step 4: Simplify right side
   28,555.02x = 421,147,111.83
5. Step 5: Solve for x
   x = 421,147,111.83/28,555.02
6. Step 6: Final answer
   x = 14,748.62