Finding the Fourth Proportional to 42,290.78, 58,380.64 and 36,525.30

Step by Step Solution

1. Step 1: Write the proportion equation
   42,290.78 : 58,380.64 = 36,525.30 : x
2. Step 2: Convert to fraction form
   42,290.78/58,380.64 = 36,525.30/x
3. Step 3: Cross multiply
   42,290.78x = 58,380.64 × 36,525.30
4. Step 4: Simplify right side
   42,290.78x = 2,132,370,521.17
5. Step 5: Solve for x
   x = 2,132,370,521.17/42,290.78
6. Step 6: Final answer
   x = 50,421.64