Finding the Fourth Proportional to 67,409.88, 93,019.32 and 65,145.12

Step by Step Solution

1. Step 1: Write the proportion equation
   67,409.88 : 93,019.32 = 65,145.12 : x
2. Step 2: Convert to fraction form
   67,409.88/93,019.32 = 65,145.12/x
3. Step 3: Cross multiply
   67,409.88x = 93,019.32 × 65,145.12
4. Step 4: Simplify right side
   67,409.88x = 6,059,754,763.72
5. Step 5: Solve for x
   x = 6,059,754,763.72/67,409.88
6. Step 6: Final answer
   x = 89,894.16