Finding the Fourth Proportional to 121,111.80, 167,100.72 and 72,701.16

Step by Step Solution

1. Step 1: Write the proportion equation
   121,111.80 : 167,100.72 = 72,701.16 : x
2. Step 2: Convert to fraction form
   121,111.80/167,100.72 = 72,701.16/x
3. Step 3: Cross multiply
   121,111.80x = 167,100.72 × 72,701.16
4. Step 4: Simplify right side
   121,111.80x = 12,148,416,180.84
5. Step 5: Solve for x
   x = 12,148,416,180.84/121,111.80
6. Step 6: Final answer
   x = 100,307.45