Finding the Fourth Proportional to 42,465.02, 63,690.32 and 12,875.72

Step by Step Solution

1. Step 1: Write the proportion equation
   42,465.02 : 63,690.32 = 12,875.72 : x
2. Step 2: Convert to fraction form
   42,465.02/63,690.32 = 12,875.72/x
3. Step 3: Cross multiply
   42,465.02x = 63,690.32 × 12,875.72
4. Step 4: Simplify right side
   42,465.02x = 820,058,344.20
5. Step 5: Solve for x
   x = 820,058,344.20/42,465.02
6. Step 6: Final answer
   x = 19,311.39