Finding the Fourth Proportional to 139,968,057.76, 193,155,634.56 and 78,084,705.76

Step by Step Solution

1. Step 1: Write the proportion equation
   139,968,057.76 : 193,155,634.56 = 78,084,705.76 : x
2. Step 2: Convert to fraction form
   139,968,057.76/193,155,634.56 = 78,084,705.76/x
3. Step 3: Cross multiply
   139,968,057.76x = 193,155,634.56 × 78,084,705.76
4. Step 4: Simplify right side
   139,968,057.76x = 15,082,500,890,503,688
5. Step 5: Solve for x
   x = 15,082,500,890,503,688/139,968,057.76
6. Step 6: Final answer
   x = 107,756,734.87