Finding the Fourth Proportional to 42,015.90, 63,036.10 and 12,434.52

Step by Step Solution

1. Step 1: Write the proportion equation
   42,015.90 : 63,036.10 = 12,434.52 : x
2. Step 2: Convert to fraction form
   42,015.90/63,036.10 = 12,434.52/x
3. Step 3: Cross multiply
   42,015.90x = 63,036.10 × 12,434.52
4. Step 4: Simplify right side
   42,015.90x = 783,823,646.17
5. Step 5: Solve for x
   x = 783,823,646.17/42,015.90
6. Step 6: Final answer
   x = 18,655.41