Finding the Fourth Proportional to 112,870.72, 169,289.76 and 79,034.08

Step by Step Solution

1. Step 1: Write the proportion equation
   112,870.72 : 169,289.76 = 79,034.08 : x
2. Step 2: Convert to fraction form
   112,870.72/169,289.76 = 79,034.08/x
3. Step 3: Cross multiply
   112,870.72x = 169,289.76 × 79,034.08
4. Step 4: Simplify right side
   112,870.72x = 13,379,660,435.02
5. Step 5: Solve for x
   x = 13,379,660,435.02/112,870.72
6. Step 6: Final answer
   x = 118,539.69