Finding the Fourth Proportional to 99,129.15, 148,694.00 and 69,678.72

Step by Step Solution

1. Step 1: Write the proportion equation
   99,129.15 : 148,694.00 = 69,678.72 : x
2. Step 2: Convert to fraction form
   99,129.15/148,694.00 = 69,678.72/x
3. Step 3: Cross multiply
   99,129.15x = 148,694.00 × 69,678.72
4. Step 4: Simplify right side
   99,129.15x = 10,360,807,243.29
5. Step 5: Solve for x
   x = 10,360,807,243.29/99,129.15
6. Step 6: Final answer
   x = 104,518.27