Finding the Fourth Proportional to 112,985.50, 169,478.20 and 42,864.82

Step by Step Solution

1. Step 1: Write the proportion equation
   112,985.50 : 169,478.20 = 42,864.82 : x
2. Step 2: Convert to fraction form
   112,985.50/169,478.20 = 42,864.82/x
3. Step 3: Cross multiply
   112,985.50x = 169,478.20 × 42,864.82
4. Step 4: Simplify right side
   112,985.50x = 7,264,652,536.92
5. Step 5: Solve for x
   x = 7,264,652,536.92/112,985.50
6. Step 6: Final answer
   x = 64,297.21