Finding the Fourth Proportional to 128,002.56, 176,643 and 71,413.98

Step by Step Solution

1. Step 1: Write the proportion equation
   128,002.56 : 176,643 = 71,413.98 : x
2. Step 2: Convert to fraction form
   128,002.56/176,643 = 71,413.98/x
3. Step 3: Cross multiply
   128,002.56x = 176,643 × 71,413.98
4. Step 4: Simplify right side
   128,002.56x = 12,614,779,669.14
5. Step 5: Solve for x
   x = 12,614,779,669.14/128,002.56
6. Step 6: Final answer
   x = 98,551.00