Finding the Fourth Proportional to 28,430.49, 42,592.43 and 23,780.39

Step by Step Solution

1. Step 1: Write the proportion equation
   28,430.49 : 42,592.43 = 23,780.39 : x
2. Step 2: Convert to fraction form
   28,430.49/42,592.43 = 23,780.39/x
3. Step 3: Cross multiply
   28,430.49x = 42,592.43 × 23,780.39
4. Step 4: Simplify right side
   28,430.49x = 1,012,864,442.94
5. Step 5: Solve for x
   x = 1,012,864,442.94/28,430.49
6. Step 6: Final answer
   x = 35,625.99