Finding the Fourth Proportional to 121,271.88, 181,886.16 and 42,408.72

Step by Step Solution

1. Step 1: Write the proportion equation
   121,271.88 : 181,886.16 = 42,408.72 : x
2. Step 2: Convert to fraction form
   121,271.88/181,886.16 = 42,408.72/x
3. Step 3: Cross multiply
   121,271.88x = 181,886.16 × 42,408.72
4. Step 4: Simplify right side
   121,271.88x = 7,713,559,231.32
5. Step 5: Solve for x
   x = 7,713,559,231.32/121,271.88
6. Step 6: Final answer
   x = 63,605.51