Finding the Fourth Proportional to 145,870.78, 201,301.80 and 78,802.78

Step by Step Solution

1. Step 1: Write the proportion equation
   145,870.78 : 201,301.80 = 78,802.78 : x
2. Step 2: Convert to fraction form
   145,870.78/201,301.80 = 78,802.78/x
3. Step 3: Cross multiply
   145,870.78x = 201,301.80 × 78,802.78
4. Step 4: Simplify right side
   145,870.78x = 15,863,141,459.00
5. Step 5: Solve for x
   x = 15,863,141,459.00/145,870.78
6. Step 6: Final answer
   x = 108,747.90