Finding the Fourth Proportional to 102,619.78, 141,638.90 and 60,191.98

Step by Step Solution

1. Step 1: Write the proportion equation
   102,619.78 : 141,638.90 = 60,191.98 : x
2. Step 2: Convert to fraction form
   102,619.78/141,638.90 = 60,191.98/x
3. Step 3: Cross multiply
   102,619.78x = 141,638.90 × 60,191.98
4. Step 4: Simplify right side
   102,619.78x = 8,525,525,836.02
5. Step 5: Solve for x
   x = 8,525,525,836.02/102,619.78
6. Step 6: Final answer
   x = 83,078.78