Finding the Fourth Proportional to 78,013.29, 107,560.73 and 65,111.01

Step by Step Solution

1. Step 1: Write the proportion equation
   78,013.29 : 107,560.73 = 65,111.01 : x
2. Step 2: Convert to fraction form
   78,013.29/107,560.73 = 65,111.01/x
3. Step 3: Cross multiply
   78,013.29x = 107,560.73 × 65,111.01
4. Step 4: Simplify right side
   78,013.29x = 7,003,387,441.08
5. Step 5: Solve for x
   x = 7,003,387,441.08/78,013.29
6. Step 6: Final answer
   x = 89,771.72