Finding the Fourth Proportional to 42,535.09, 63,811.86 and 12,952.15

Step by Step Solution

1. Step 1: Write the proportion equation
   42,535.09 : 63,811.86 = 12,952.15 : x
2. Step 2: Convert to fraction form
   42,535.09/63,811.86 = 12,952.15/x
3. Step 3: Cross multiply
   42,535.09x = 63,811.86 × 12,952.15
4. Step 4: Simplify right side
   42,535.09x = 826,500,782.50
5. Step 5: Solve for x
   x = 826,500,782.50/42,535.09
6. Step 6: Final answer
   x = 19,431.03