Finding the Fourth Proportional to 72,920.16, 109,774.16 and 65,588.04

Step by Step Solution

1. Step 1: Write the proportion equation
   72,920.16 : 109,774.16 = 65,588.04 : x
2. Step 2: Convert to fraction form
   72,920.16/109,774.16 = 65,588.04/x
3. Step 3: Cross multiply
   72,920.16x = 109,774.16 × 65,588.04
4. Step 4: Simplify right side
   72,920.16x = 7,199,872,161.02
5. Step 5: Solve for x
   x = 7,199,872,161.02/72,920.16
6. Step 6: Final answer
   x = 98,736.37