Finding the Fourth Proportional to 81,686,357.67, 122,565,720.10 and 42,815,571.83

Step by Step Solution

1. Step 1: Write the proportion equation
   81,686,357.67 : 122,565,720.10 = 42,815,571.83 : x
2. Step 2: Convert to fraction form
   81,686,357.67/122,565,720.10 = 42,815,571.83/x
3. Step 3: Cross multiply
   81,686,357.67x = 122,565,720.10 × 42,815,571.83
4. Step 4: Simplify right side
   81,686,357.67x = 5,247,721,392,837,224
5. Step 5: Solve for x
   x = 5,247,721,392,837,224/81,686,357.67
6. Step 6: Final answer
   x = 64,242,323.23