Finding the Fourth Proportional to 76,401.60, 105,432.52 and 42,408.08

Step by Step Solution

1. Step 1: Write the proportion equation
   76,401.60 : 105,432.52 = 42,408.08 : x
2. Step 2: Convert to fraction form
   76,401.60/105,432.52 = 42,408.08/x
3. Step 3: Cross multiply
   76,401.60x = 105,432.52 × 42,408.08
4. Step 4: Simplify right side
   76,401.60x = 4,471,190,742.76
5. Step 5: Solve for x
   x = 4,471,190,742.76/76,401.60
6. Step 6: Final answer
   x = 58,522.21