Finding the Fourth Proportional to 76,392.85, 105,419.01 and 42,402.76

Step by Step Solution

1. Step 1: Write the proportion equation
   76,392.85 : 105,419.01 = 42,402.76 : x
2. Step 2: Convert to fraction form
   76,392.85/105,419.01 = 42,402.76/x
3. Step 3: Cross multiply
   76,392.85x = 105,419.01 × 42,402.76
4. Step 4: Simplify right side
   76,392.85x = 4,470,056,980.47
5. Step 5: Solve for x
   x = 4,470,056,980.47/76,392.85
6. Step 6: Final answer
   x = 58,514.08