Finding the Fourth Proportional to 428,111.37, 642,116.03 and 112,592.88

Step by Step Solution

1. Step 1: Write the proportion equation
   428,111.37 : 642,116.03 = 112,592.88 : x
2. Step 2: Convert to fraction form
   428,111.37/642,116.03 = 112,592.88/x
3. Step 3: Cross multiply
   428,111.37x = 642,116.03 × 112,592.88
4. Step 4: Simplify right side
   428,111.37x = 72,297,692,548.90
5. Step 5: Solve for x
   x = 72,297,692,548.90/428,111.37
6. Step 6: Final answer
   x = 168,875.90