Finding the Fourth Proportional to 42,383.34, 63,560.30 and 12,389.54

Step by Step Solution

1. Step 1: Write the proportion equation
   42,383.34 : 63,560.30 = 12,389.54 : x
2. Step 2: Convert to fraction form
   42,383.34/63,560.30 = 12,389.54/x
3. Step 3: Cross multiply
   42,383.34x = 63,560.30 × 12,389.54
4. Step 4: Simplify right side
   42,383.34x = 787,482,499.51
5. Step 5: Solve for x
   x = 787,482,499.51/42,383.34
6. Step 6: Final answer
   x = 18,580.00