Finding the Fourth Proportional to 118,624.98, 163,695.42 and 64,899.30

Step by Step Solution

1. Step 1: Write the proportion equation
   118,624.98 : 163,695.42 = 64,899.30 : x
2. Step 2: Convert to fraction form
   118,624.98/163,695.42 = 64,899.30/x
3. Step 3: Cross multiply
   118,624.98x = 163,695.42 × 64,899.30
4. Step 4: Simplify right side
   118,624.98x = 10,623,718,171.21
5. Step 5: Solve for x
   x = 10,623,718,171.21/118,624.98
6. Step 6: Final answer
   x = 89,557.18