Finding the Fourth Proportional to 65,645.25, 98,492.12 and 53,111.18

Step by Step Solution

1. Step 1: Write the proportion equation
   65,645.25 : 98,492.12 = 53,111.18 : x
2. Step 2: Convert to fraction form
   65,645.25/98,492.12 = 53,111.18/x
3. Step 3: Cross multiply
   65,645.25x = 98,492.12 × 53,111.18
4. Step 4: Simplify right side
   65,645.25x = 5,231,031,955.89
5. Step 5: Solve for x
   x = 5,231,031,955.89/65,645.25
6. Step 6: Final answer
   x = 79,686.37