Finding the Fourth Proportional to 42,510.56, 63,768.48 and 12,930.58

Step by Step Solution

1. Step 1: Write the proportion equation
   42,510.56 : 63,768.48 = 12,930.58 : x
2. Step 2: Convert to fraction form
   42,510.56/63,768.48 = 12,930.58/x
3. Step 3: Cross multiply
   42,510.56x = 63,768.48 × 12,930.58
4. Step 4: Simplify right side
   42,510.56x = 824,563,432.12
5. Step 5: Solve for x
   x = 824,563,432.12/42,510.56
6. Step 6: Final answer
   x = 19,396.67