Finding the Fourth Proportional to 153,984.50, 212,498.61 and 83,328.50

Step by Step Solution

1. Step 1: Write the proportion equation
   153,984.50 : 212,498.61 = 83,328.50 : x
2. Step 2: Convert to fraction form
   153,984.50/212,498.61 = 83,328.50/x
3. Step 3: Cross multiply
   153,984.50x = 212,498.61 × 83,328.50
4. Step 4: Simplify right side
   153,984.50x = 17,707,190,423.39
5. Step 5: Solve for x
   x = 17,707,190,423.39/153,984.50
6. Step 6: Final answer
   x = 114,993.33