Finding the Fourth Proportional to 76,618.81, 105,730.52 and 42,624.63

Step by Step Solution

1. Step 1: Write the proportion equation
   76,618.81 : 105,730.52 = 42,624.63 : x
2. Step 2: Convert to fraction form
   76,618.81/105,730.52 = 42,624.63/x
3. Step 3: Cross multiply
   76,618.81x = 105,730.52 × 42,624.63
4. Step 4: Simplify right side
   76,618.81x = 4,506,724,081.58
5. Step 5: Solve for x
   x = 4,506,724,081.58/76,618.81
6. Step 6: Final answer
   x = 58,820.07