Finding the Fourth Proportional to 72,816.84, 109,147.50 and 51,977.16

Step by Step Solution

1. Step 1: Write the proportion equation
   72,816.84 : 109,147.50 = 51,977.16 : x
2. Step 2: Convert to fraction form
   72,816.84/109,147.50 = 51,977.16/x
3. Step 3: Cross multiply
   72,816.84x = 109,147.50 × 51,977.16
4. Step 4: Simplify right side
   72,816.84x = 5,673,177,071.10
5. Step 5: Solve for x
   x = 5,673,177,071.10/72,816.84
6. Step 6: Final answer
   x = 77,910.23