Finding the Fourth Proportional to 81,188,820.22, 111,932,185.18 and 64,498,937.62

Step by Step Solution

1. Step 1: Write the proportion equation
   81,188,820.22 : 111,932,185.18 = 64,498,937.62 : x
2. Step 2: Convert to fraction form
   81,188,820.22/111,932,185.18 = 64,498,937.62/x
3. Step 3: Cross multiply
   81,188,820.22x = 111,932,185.18 × 64,498,937.62
4. Step 4: Simplify right side
   81,188,820.22x = 7,219,507,029,595,109
5. Step 5: Solve for x
   x = 7,219,507,029,595,109/81,188,820.22
6. Step 6: Final answer
   x = 88,922,428.11