Finding the Fourth Proportional to 65,513.14, 91,014.43 and 64,897.12

Step by Step Solution

1. Step 1: Write the proportion equation
   65,513.14 : 91,014.43 = 64,897.12 : x
2. Step 2: Convert to fraction form
   65,513.14/91,014.43 = 64,897.12/x
3. Step 3: Cross multiply
   65,513.14x = 91,014.43 × 64,897.12
4. Step 4: Simplify right side
   65,513.14x = 5,906,574,385.44
5. Step 5: Solve for x
   x = 5,906,574,385.44/65,513.14
6. Step 6: Final answer
   x = 90,158.62