Finding the Fourth Proportional to 112,061.64, 167,979.06 and 72,643.80

Step by Step Solution

1. Step 1: Write the proportion equation
   112,061.64 : 167,979.06 = 72,643.80 : x
2. Step 2: Convert to fraction form
   112,061.64/167,979.06 = 72,643.80/x
3. Step 3: Cross multiply
   112,061.64x = 167,979.06 × 72,643.80
4. Step 4: Simplify right side
   112,061.64x = 12,202,637,238.83
5. Step 5: Solve for x
   x = 12,202,637,238.83/112,061.64
6. Step 6: Final answer
   x = 108,892.19