Finding the Fourth Proportional to 76,604.01, 105,719.91 and 42,618.90

Step by Step Solution

1. Step 1: Write the proportion equation
   76,604.01 : 105,719.91 = 42,618.90 : x
2. Step 2: Convert to fraction form
   76,604.01/105,719.91 = 42,618.90/x
3. Step 3: Cross multiply
   76,604.01x = 105,719.91 × 42,618.90
4. Step 4: Simplify right side
   76,604.01x = 4,505,666,272.30
5. Step 5: Solve for x
   x = 4,505,666,272.30/76,604.01
6. Step 6: Final answer
   x = 58,817.63