Finding the Fourth Proportional to 42,603.18, 58,782.96 and 28,446

Step by Step Solution

1. Step 1: Write the proportion equation
   42,603.18 : 58,782.96 = 28,446 : x
2. Step 2: Convert to fraction form
   42,603.18/58,782.96 = 28,446/x
3. Step 3: Cross multiply
   42,603.18x = 58,782.96 × 28,446
4. Step 4: Simplify right side
   42,603.18x = 1,672,140,080.16
5. Step 5: Solve for x
   x = 1,672,140,080.16/42,603.18
6. Step 6: Final answer
   x = 39,249.18