Finding the Fourth Proportional to 78,980.88, 108,923.04 and 65,530.84

Step by Step Solution

1. Step 1: Write the proportion equation
   78,980.88 : 108,923.04 = 65,530.84 : x
2. Step 2: Convert to fraction form
   78,980.88/108,923.04 = 65,530.84/x
3. Step 3: Cross multiply
   78,980.88x = 108,923.04 × 65,530.84
4. Step 4: Simplify right side
   78,980.88x = 7,137,818,306.55
5. Step 5: Solve for x
   x = 7,137,818,306.55/78,980.88
6. Step 6: Final answer
   x = 90,374.00