Finding the Fourth Proportional to 99,806.72, 149,788.30 and 69,624.64

Step by Step Solution

1. Step 1: Write the proportion equation
   99,806.72 : 149,788.30 = 69,624.64 : x
2. Step 2: Convert to fraction form
   99,806.72/149,788.30 = 69,624.64/x
3. Step 3: Cross multiply
   99,806.72x = 149,788.30 × 69,624.64
4. Step 4: Simplify right side
   99,806.72x = 10,428,956,463.71
5. Step 5: Solve for x
   x = 10,428,956,463.71/99,806.72
6. Step 6: Final answer
   x = 104,491.53