Finding the Fourth Proportional to 65,656.50, 90,343.52 and 63,819.42

Step by Step Solution

1. Step 1: Write the proportion equation
   65,656.50 : 90,343.52 = 63,819.42 : x
2. Step 2: Convert to fraction form
   65,656.50/90,343.52 = 63,819.42/x
3. Step 3: Cross multiply
   65,656.50x = 90,343.52 × 63,819.42
4. Step 4: Simplify right side
   65,656.50x = 5,765,671,047.16
5. Step 5: Solve for x
   x = 5,765,671,047.16/65,656.50
6. Step 6: Final answer
   x = 87,815.69