Finding the Fourth Proportional to 428,852.37, 643,301.64 and 113,300.67

Step by Step Solution

1. Step 1: Write the proportion equation
   428,852.37 : 643,301.64 = 113,300.67 : x
2. Step 2: Convert to fraction form
   428,852.37/643,301.64 = 113,300.67/x
3. Step 3: Cross multiply
   428,852.37x = 643,301.64 × 113,300.67
4. Step 4: Simplify right side
   428,852.37x = 72,886,506,824.10
5. Step 5: Solve for x
   x = 72,886,506,824.10/428,852.37
6. Step 6: Final answer
   x = 169,957.10