Finding the Fourth Proportional to 107,642.90, 148,531.40 and 64,613.27

Step by Step Solution

1. Step 1: Write the proportion equation
   107,642.90 : 148,531.40 = 64,613.27 : x
2. Step 2: Convert to fraction form
   107,642.90/148,531.40 = 64,613.27/x
3. Step 3: Cross multiply
   107,642.90x = 148,531.40 × 64,613.27
4. Step 4: Simplify right side
   107,642.90x = 9,597,100,105.69
5. Step 5: Solve for x
   x = 9,597,100,105.69/107,642.90
6. Step 6: Final answer
   x = 89,156.83