Finding the Fourth Proportional to 129,152.04, 178,231.50 and 78,164.16

Step by Step Solution

1. Step 1: Write the proportion equation
   129,152.04 : 178,231.50 = 78,164.16 : x
2. Step 2: Convert to fraction form
   129,152.04/178,231.50 = 78,164.16/x
3. Step 3: Cross multiply
   129,152.04x = 178,231.50 × 78,164.16
4. Step 4: Simplify right side
   129,152.04x = 13,931,315,483.04
5. Step 5: Solve for x
   x = 13,931,315,483.04/129,152.04
6. Step 6: Final answer
   x = 107,867.56