Finding the Fourth Proportional to 112,885.38, 155,665.54 and 78,881.48

Step by Step Solution

1. Step 1: Write the proportion equation
   112,885.38 : 155,665.54 = 78,881.48 : x
2. Step 2: Convert to fraction form
   112,885.38/155,665.54 = 78,881.48/x
3. Step 3: Cross multiply
   112,885.38x = 155,665.54 × 78,881.48
4. Step 4: Simplify right side
   112,885.38x = 12,279,127,204.67
5. Step 5: Solve for x
   x = 12,279,127,204.67/112,885.38
6. Step 6: Final answer
   x = 108,775.18