Finding the Fourth Proportional to 77,408.07, 116,145 and 42,306.72

Step by Step Solution

1. Step 1: Write the proportion equation
   77,408.07 : 116,145 = 42,306.72 : x
2. Step 2: Convert to fraction form
   77,408.07/116,145 = 42,306.72/x
3. Step 3: Cross multiply
   77,408.07x = 116,145 × 42,306.72
4. Step 4: Simplify right side
   77,408.07x = 4,913,713,994.40
5. Step 5: Solve for x
   x = 4,913,713,994.40/77,408.07
6. Step 6: Final answer
   x = 63,478.06