Finding the Fourth Proportional to 112,139.40, 168,018.69 and 67,672.72

Step by Step Solution

1. Step 1: Write the proportion equation
   112,139.40 : 168,018.69 = 67,672.72 : x
2. Step 2: Convert to fraction form
   112,139.40/168,018.69 = 67,672.72/x
3. Step 3: Cross multiply
   112,139.40x = 168,018.69 × 67,672.72
4. Step 4: Simplify right side
   112,139.40x = 11,370,281,343.09
5. Step 5: Solve for x
   x = 11,370,281,343.09/112,139.40
6. Step 6: Final answer
   x = 101,394.17