Finding the Fourth Proportional to 112,969.84, 155,898.12 and 65,221.96

Step by Step Solution

1. Step 1: Write the proportion equation
   112,969.84 : 155,898.12 = 65,221.96 : x
2. Step 2: Convert to fraction form
   112,969.84/155,898.12 = 65,221.96/x
3. Step 3: Cross multiply
   112,969.84x = 155,898.12 × 65,221.96
4. Step 4: Simplify right side
   112,969.84x = 10,167,980,946.72
5. Step 5: Solve for x
   x = 10,167,980,946.72/112,969.84
6. Step 6: Final answer
   x = 90,006.16