Finding the Fourth Proportional to 67,899.78, 102,015.72 and 64,123.08

Step by Step Solution

1. Step 1: Write the proportion equation
   67,899.78 : 102,015.72 = 64,123.08 : x
2. Step 2: Convert to fraction form
   67,899.78/102,015.72 = 64,123.08/x
3. Step 3: Cross multiply
   67,899.78x = 102,015.72 × 64,123.08
4. Step 4: Simplify right side
   67,899.78x = 6,541,562,174.82
5. Step 5: Solve for x
   x = 6,541,562,174.82/67,899.78
6. Step 6: Final answer
   x = 96,341.43