Finding the Fourth Proportional to 139,979.81, 193,172.00 and 76,317.59

Step by Step Solution

1. Step 1: Write the proportion equation
   139,979.81 : 193,172.00 = 76,317.59 : x
2. Step 2: Convert to fraction form
   139,979.81/193,172.00 = 76,317.59/x
3. Step 3: Cross multiply
   139,979.81x = 193,172.00 × 76,317.59
4. Step 4: Simplify right side
   139,979.81x = 14,742,420,148.03
5. Step 5: Solve for x
   x = 14,742,420,148.03/139,979.81
6. Step 6: Final answer
   x = 105,318.19