Finding the Fourth Proportional to 115,300.59, 159,114.76 and 64,999.59

Step by Step Solution

1. Step 1: Write the proportion equation
   115,300.59 : 159,114.76 = 64,999.59 : x
2. Step 2: Convert to fraction form
   115,300.59/159,114.76 = 64,999.59/x
3. Step 3: Cross multiply
   115,300.59x = 159,114.76 × 64,999.59
4. Step 4: Simplify right side
   115,300.59x = 10,342,394,162.95
5. Step 5: Solve for x
   x = 10,342,394,162.95/115,300.59
6. Step 6: Final answer
   x = 89,699.40