Finding the Fourth Proportional to 166,291.81, 249,499.69 and 99,779.67

Step by Step Solution

1. Step 1: Write the proportion equation
   166,291.81 : 249,499.69 = 99,779.67 : x
2. Step 2: Convert to fraction form
   166,291.81/249,499.69 = 99,779.67/x
3. Step 3: Cross multiply
   166,291.81x = 249,499.69 × 99,779.67
4. Step 4: Simplify right side
   166,291.81x = 24,894,996,483.85
5. Step 5: Solve for x
   x = 24,894,996,483.85/166,291.81
6. Step 6: Final answer
   x = 149,706.69