Finding the Fourth Proportional to 76,691.36, 105,833.23 and 42,699.10

Step by Step Solution

1. Step 1: Write the proportion equation
   76,691.36 : 105,833.23 = 42,699.10 : x
2. Step 2: Convert to fraction form
   76,691.36/105,833.23 = 42,699.10/x
3. Step 3: Cross multiply
   76,691.36x = 105,833.23 × 42,699.10
4. Step 4: Simplify right side
   76,691.36x = 4,518,983,299.76
5. Step 5: Solve for x
   x = 4,518,983,299.76/76,691.36
6. Step 6: Final answer
   x = 58,924.29