Finding the Fourth Proportional to 65,994.96, 91,064.88 and 42,135.60

Step by Step Solution

1. Step 1: Write the proportion equation
   65,994.96 : 91,064.88 = 42,135.60 : x
2. Step 2: Convert to fraction form
   65,994.96/91,064.88 = 42,135.60/x
3. Step 3: Cross multiply
   65,994.96x = 91,064.88 × 42,135.60
4. Step 4: Simplify right side
   65,994.96x = 3,837,073,357.73
5. Step 5: Solve for x
   x = 3,837,073,357.73/65,994.96
6. Step 6: Final answer
   x = 58,141.92