Finding the Fourth Proportional to 168,019.24, 231,763.94 and 99,990.52

Step by Step Solution

1. Step 1: Write the proportion equation
   168,019.24 : 231,763.94 = 99,990.52 : x
2. Step 2: Convert to fraction form
   168,019.24/231,763.94 = 99,990.52/x
3. Step 3: Cross multiply
   168,019.24x = 231,763.94 × 99,990.52
4. Step 4: Simplify right side
   168,019.24x = 23,174,196,877.85
5. Step 5: Solve for x
   x = 23,174,196,877.85/168,019.24
6. Step 6: Final answer
   x = 137,925.85