Finding the Fourth Proportional to 72,987.48, 109,267.98 and 65,983.68

Step by Step Solution

1. Step 1: Write the proportion equation
   72,987.48 : 109,267.98 = 65,983.68 : x
2. Step 2: Convert to fraction form
   72,987.48/109,267.98 = 65,983.68/x
3. Step 3: Cross multiply
   72,987.48x = 109,267.98 × 65,983.68
4. Step 4: Simplify right side
   72,987.48x = 7,209,903,426.57
5. Step 5: Solve for x
   x = 7,209,903,426.57/72,987.48
6. Step 6: Final answer
   x = 98,782.74