Finding the Fourth Proportional to 115,808.42, 159,802.16 and 64,824

Step by Step Solution

1. Step 1: Write the proportion equation
   115,808.42 : 159,802.16 = 64,824 : x
2. Step 2: Convert to fraction form
   115,808.42/159,802.16 = 64,824/x
3. Step 3: Cross multiply
   115,808.42x = 159,802.16 × 64,824
4. Step 4: Simplify right side
   115,808.42x = 10,359,015,219.84
5. Step 5: Solve for x
   x = 10,359,015,219.84/115,808.42
6. Step 6: Final answer
   x = 89,449.59