Finding the Fourth Proportional to 118,339.71, 163,307.72 and 64,624.56

Step by Step Solution

1. Step 1: Write the proportion equation
   118,339.71 : 163,307.72 = 64,624.56 : x
2. Step 2: Convert to fraction form
   118,339.71/163,307.72 = 64,624.56/x
3. Step 3: Cross multiply
   118,339.71x = 163,307.72 × 64,624.56
4. Step 4: Simplify right side
   118,339.71x = 10,553,689,226.48
5. Step 5: Solve for x
   x = 10,553,689,226.48/118,339.71
6. Step 6: Final answer
   x = 89,181.30