Finding the Fourth Proportional to 115,978.10, 160,063.02 and 65,004.57

Step by Step Solution

1. Step 1: Write the proportion equation
   115,978.10 : 160,063.02 = 65,004.57 : x
2. Step 2: Convert to fraction form
   115,978.10/160,063.02 = 65,004.57/x
3. Step 3: Cross multiply
   115,978.10x = 160,063.02 × 65,004.57
4. Step 4: Simplify right side
   115,978.10x = 10,404,827,788.00
5. Step 5: Solve for x
   x = 10,404,827,788.00/115,978.10
6. Step 6: Final answer
   x = 89,713.73