Finding the Fourth Proportional to 112,870.20, 169,499.70 and 73,601.40

Step by Step Solution

1. Step 1: Write the proportion equation
   112,870.20 : 169,499.70 = 73,601.40 : x
2. Step 2: Convert to fraction form
   112,870.20/169,499.70 = 73,601.40/x
3. Step 3: Cross multiply
   112,870.20x = 169,499.70 × 73,601.40
4. Step 4: Simplify right side
   112,870.20x = 12,475,415,219.58
5. Step 5: Solve for x
   x = 12,475,415,219.58/112,870.20
6. Step 6: Final answer
   x = 110,528.87