Finding the Fourth Proportional to 42,452.06, 63,678.26 and 12,870.15

Step by Step Solution

1. Step 1: Write the proportion equation
   42,452.06 : 63,678.26 = 12,870.15 : x
2. Step 2: Convert to fraction form
   42,452.06/63,678.26 = 12,870.15/x
3. Step 3: Cross multiply
   42,452.06x = 63,678.26 × 12,870.15
4. Step 4: Simplify right side
   42,452.06x = 819,549,017.16
5. Step 5: Solve for x
   x = 819,549,017.16/42,452.06
6. Step 6: Final answer
   x = 19,305.28