Finding the Fourth Proportional to 100,036.81, 137,915.72 and 64,164.54

Step by Step Solution

1. Step 1: Write the proportion equation
   100,036.81 : 137,915.72 = 64,164.54 : x
2. Step 2: Convert to fraction form
   100,036.81/137,915.72 = 64,164.54/x
3. Step 3: Cross multiply
   100,036.81x = 137,915.72 × 64,164.54
4. Step 4: Simplify right side
   100,036.81x = 8,849,298,732.57
5. Step 5: Solve for x
   x = 8,849,298,732.57/100,036.81
6. Step 6: Final answer
   x = 88,460.43