Finding the Fourth Proportional to 118,424.68, 163,426.31 and 64,710.60

Step by Step Solution

1. Step 1: Write the proportion equation
   118,424.68 : 163,426.31 = 64,710.60 : x
2. Step 2: Convert to fraction form
   118,424.68/163,426.31 = 64,710.60/x
3. Step 3: Cross multiply
   118,424.68x = 163,426.31 × 64,710.60
4. Step 4: Simplify right side
   118,424.68x = 10,575,413,882.15
5. Step 5: Solve for x
   x = 10,575,413,882.15/118,424.68
6. Step 6: Final answer
   x = 89,300.76