Finding the Fourth Proportional to 259,506,978.05, 358,118,340.77 and 140,429,486.36

Step by Step Solution

1. Step 1: Write the proportion equation
   259,506,978.05 : 358,118,340.77 = 140,429,486.36 : x
2. Step 2: Convert to fraction form
   259,506,978.05/358,118,340.77 = 140,429,486.36/x
3. Step 3: Cross multiply
   259,506,978.05x = 358,118,340.77 × 140,429,486.36
4. Step 4: Simplify right side
   259,506,978.05x = 50,290,374,647,933,800
5. Step 5: Solve for x
   x = 50,290,374,647,933,800/259,506,978.05
6. Step 6: Final answer
   x = 193,791,993.68