Finding the Fourth Proportional to 102,019.22, 140,807.49 and 64,268.18

Step by Step Solution

1. Step 1: Write the proportion equation
   102,019.22 : 140,807.49 = 64,268.18 : x
2. Step 2: Convert to fraction form
   102,019.22/140,807.49 = 64,268.18/x
3. Step 3: Cross multiply
   102,019.22x = 140,807.49 × 64,268.18
4. Step 4: Simplify right side
   102,019.22x = 9,049,441,112.67
5. Step 5: Solve for x
   x = 9,049,441,112.67/102,019.22
6. Step 6: Final answer
   x = 88,703.30