Finding the Fourth Proportional to 72,981.93, 109,259.53 and 65,978.00

Step by Step Solution

1. Step 1: Write the proportion equation
   72,981.93 : 109,259.53 = 65,978.00 : x
2. Step 2: Convert to fraction form
   72,981.93/109,259.53 = 65,978.00/x
3. Step 3: Cross multiply
   72,981.93x = 109,259.53 × 65,978.00
4. Step 4: Simplify right side
   72,981.93x = 7,208,724,559.10
5. Step 5: Solve for x
   x = 7,208,724,559.10/72,981.93
6. Step 6: Final answer
   x = 98,774.10