Finding the Fourth Proportional to 107,361.69, 148,172.80 and 64,920.53

Step by Step Solution

1. Step 1: Write the proportion equation
   107,361.69 : 148,172.80 = 64,920.53 : x
2. Step 2: Convert to fraction form
   107,361.69/148,172.80 = 64,920.53/x
3. Step 3: Cross multiply
   107,361.69x = 148,172.80 × 64,920.53
4. Step 4: Simplify right side
   107,361.69x = 9,619,455,966.72
5. Step 5: Solve for x
   x = 9,619,455,966.72/107,361.69
6. Step 6: Final answer
   x = 89,598.59