Finding the Fourth Proportional to 105,931,480.80, 158,976,078.48 and 78,701,172.96

Step by Step Solution

1. Step 1: Write the proportion equation
   105,931,480.80 : 158,976,078.48 = 78,701,172.96 : x
2. Step 2: Convert to fraction form
   105,931,480.80/158,976,078.48 = 78,701,172.96/x
3. Step 3: Cross multiply
   105,931,480.80x = 158,976,078.48 × 78,701,172.96
4. Step 4: Simplify right side
   105,931,480.80x = 12,511,603,848,957,012
5. Step 5: Solve for x
   x = 12,511,603,848,957,012/105,931,480.80
6. Step 6: Final answer
   x = 118,110,345.99