Finding the Fourth Proportional to 154,141.11, 231,054.01 and 78,098.78

Step by Step Solution

1. Step 1: Write the proportion equation
   154,141.11 : 231,054.01 = 78,098.78 : x
2. Step 2: Convert to fraction form
   154,141.11/231,054.01 = 78,098.78/x
3. Step 3: Cross multiply
   154,141.11x = 231,054.01 × 78,098.78
4. Step 4: Simplify right side
   154,141.11x = 18,045,036,677.50
5. Step 5: Solve for x
   x = 18,045,036,677.50/154,141.11
6. Step 6: Final answer
   x = 117,068.29