Finding the Fourth Proportional to 65,340.42, 90,156.04 and 42,712.72

Step by Step Solution

1. Step 1: Write the proportion equation
   65,340.42 : 90,156.04 = 42,712.72 : x
2. Step 2: Convert to fraction form
   65,340.42/90,156.04 = 42,712.72/x
3. Step 3: Cross multiply
   65,340.42x = 90,156.04 × 42,712.72
4. Step 4: Simplify right side
   65,340.42x = 3,850,809,692.83
5. Step 5: Solve for x
   x = 3,850,809,692.83/65,340.42
6. Step 6: Final answer
   x = 58,934.57