Finding the Fourth Proportional to 123,421.86, 170,334.74 and 88,994.91

Step by Step Solution

1. Step 1: Write the proportion equation
   123,421.86 : 170,334.74 = 88,994.91 : x
2. Step 2: Convert to fraction form
   123,421.86/170,334.74 = 88,994.91/x
3. Step 3: Cross multiply
   123,421.86x = 170,334.74 × 88,994.91
4. Step 4: Simplify right side
   123,421.86x = 15,158,924,411.20
5. Step 5: Solve for x
   x = 15,158,924,411.20/123,421.86
6. Step 6: Final answer
   x = 122,822.04