Finding the Fourth Proportional to 108,428.51, 149,634.71 and 60,681.75

Step by Step Solution

1. Step 1: Write the proportion equation
   108,428.51 : 149,634.71 = 60,681.75 : x
2. Step 2: Convert to fraction form
   108,428.51/149,634.71 = 60,681.75/x
3. Step 3: Cross multiply
   108,428.51x = 149,634.71 × 60,681.75
4. Step 4: Simplify right side
   108,428.51x = 9,080,096,063.54
5. Step 5: Solve for x
   x = 9,080,096,063.54/108,428.51
6. Step 6: Final answer
   x = 83,742.70