Finding the Fourth Proportional to 76,677.59, 105,812.59 and 42,684.96

Step by Step Solution

1. Step 1: Write the proportion equation
   76,677.59 : 105,812.59 = 42,684.96 : x
2. Step 2: Convert to fraction form
   76,677.59/105,812.59 = 42,684.96/x
3. Step 3: Cross multiply
   76,677.59x = 105,812.59 × 42,684.96
4. Step 4: Simplify right side
   76,677.59x = 4,516,606,171.65
5. Step 5: Solve for x
   x = 4,516,606,171.65/76,677.59
6. Step 6: Final answer
   x = 58,903.86