Finding the Fourth Proportional to 102,643.54, 141,650.30 and 64,404.59

Step by Step Solution

1. Step 1: Write the proportion equation
   102,643.54 : 141,650.30 = 64,404.59 : x
2. Step 2: Convert to fraction form
   102,643.54/141,650.30 = 64,404.59/x
3. Step 3: Cross multiply
   102,643.54x = 141,650.30 × 64,404.59
4. Step 4: Simplify right side
   102,643.54x = 9,122,928,947.64
5. Step 5: Solve for x
   x = 9,122,928,947.64/102,643.54
6. Step 6: Final answer
   x = 88,879.72