Finding the Fourth Proportional to 76,159, 105,099.78 and 42,631.48

Step by Step Solution

1. Step 1: Write the proportion equation
   76,159 : 105,099.78 = 42,631.48 : x
2. Step 2: Convert to fraction form
   76,159/105,099.78 = 42,631.48/x
3. Step 3: Cross multiply
   76,159x = 105,099.78 × 42,631.48
4. Step 4: Simplify right side
   76,159x = 4,480,559,169.07
5. Step 5: Solve for x
   x = 4,480,559,169.07/76,159
6. Step 6: Final answer
   x = 58,831.64