Finding the Fourth Proportional to 42,315.74, 63,460.80 and 12,725.72

Step by Step Solution

1. Step 1: Write the proportion equation
   42,315.74 : 63,460.80 = 12,725.72 : x
2. Step 2: Convert to fraction form
   42,315.74/63,460.80 = 12,725.72/x
3. Step 3: Cross multiply
   42,315.74x = 63,460.80 × 12,725.72
4. Step 4: Simplify right side
   42,315.74x = 807,584,371.78
5. Step 5: Solve for x
   x = 807,584,371.78/42,315.74
6. Step 6: Final answer
   x = 19,084.73