Finding the Fourth Proportional to 12,780.02, 19,178.78 and 4,460.03

Step by Step Solution

1. Step 1: Write the proportion equation
   12,780.02 : 19,178.78 = 4,460.03 : x
2. Step 2: Convert to fraction form
   12,780.02/19,178.78 = 4,460.03/x
3. Step 3: Cross multiply
   12,780.02x = 19,178.78 × 4,460.03
4. Step 4: Simplify right side
   12,780.02x = 85,537,956.57
5. Step 5: Solve for x
   x = 85,537,956.57/12,780.02
6. Step 6: Final answer
   x = 6,693.10