Finding the Fourth Proportional to 112,700.16, 155,212.61 and 87,112.26

Step by Step Solution

1. Step 1: Write the proportion equation
   112,700.16 : 155,212.61 = 87,112.26 : x
2. Step 2: Convert to fraction form
   112,700.16/155,212.61 = 87,112.26/x
3. Step 3: Cross multiply
   112,700.16x = 155,212.61 × 87,112.26
4. Step 4: Simplify right side
   112,700.16x = 13,520,920,802.04
5. Step 5: Solve for x
   x = 13,520,920,802.04/112,700.16
6. Step 6: Final answer
   x = 119,972.51