Finding the Fourth Proportional to 103,776.60, 155,663.30 and 70,413.72

Step by Step Solution

1. Step 1: Write the proportion equation
   103,776.60 : 155,663.30 = 70,413.72 : x
2. Step 2: Convert to fraction form
   103,776.60/155,663.30 = 70,413.72/x
3. Step 3: Cross multiply
   103,776.60x = 155,663.30 × 70,413.72
4. Step 4: Simplify right side
   103,776.60x = 10,960,832,020.48
5. Step 5: Solve for x
   x = 10,960,832,020.48/103,776.60
6. Step 6: Final answer
   x = 105,619.49