Finding the Fourth Proportional to 76,146.65, 105,081.54 and 42,155.18

Step by Step Solution

1. Step 1: Write the proportion equation
   76,146.65 : 105,081.54 = 42,155.18 : x
2. Step 2: Convert to fraction form
   76,146.65/105,081.54 = 42,155.18/x
3. Step 3: Cross multiply
   76,146.65x = 105,081.54 × 42,155.18
4. Step 4: Simplify right side
   76,146.65x = 4,429,731,233.38
5. Step 5: Solve for x
   x = 4,429,731,233.38/76,146.65
6. Step 6: Final answer
   x = 58,173.69