Finding the Fourth Proportional to 102,074.72, 153,078.06 and 42,899.36

Step by Step Solution

1. Step 1: Write the proportion equation
   102,074.72 : 153,078.06 = 42,899.36 : x
2. Step 2: Convert to fraction form
   102,074.72/153,078.06 = 42,899.36/x
3. Step 3: Cross multiply
   102,074.72x = 153,078.06 × 42,899.36
4. Step 4: Simplify right side
   102,074.72x = 6,566,950,804.04
5. Step 5: Solve for x
   x = 6,566,950,804.04/102,074.72
6. Step 6: Final answer
   x = 64,334.74