Finding the Fourth Proportional to 107,846.72, 148,839.62 and 64,840.28

Step by Step Solution

1. Step 1: Write the proportion equation
   107,846.72 : 148,839.62 = 64,840.28 : x
2. Step 2: Convert to fraction form
   107,846.72/148,839.62 = 64,840.28/x
3. Step 3: Cross multiply
   107,846.72x = 148,839.62 × 64,840.28
4. Step 4: Simplify right side
   107,846.72x = 9,650,802,635.89
5. Step 5: Solve for x
   x = 9,650,802,635.89/107,846.72
6. Step 6: Final answer
   x = 89,486.29