Finding the Fourth Proportional to 43,808.80, 65,729.40 and 42,188.80

Step by Step Solution

1. Step 1: Write the proportion equation
   43,808.80 : 65,729.40 = 42,188.80 : x
2. Step 2: Convert to fraction form
   43,808.80/65,729.40 = 42,188.80/x
3. Step 3: Cross multiply
   43,808.80x = 65,729.40 × 42,188.80
4. Step 4: Simplify right side
   43,808.80x = 2,773,044,510.72
5. Step 5: Solve for x
   x = 2,773,044,510.72/43,808.80
6. Step 6: Final answer
   x = 63,298.80