Finding the Fourth Proportional to 112,784.06, 155,647.17 and 64,399.09

Step by Step Solution

1. Step 1: Write the proportion equation
   112,784.06 : 155,647.17 = 64,399.09 : x
2. Step 2: Convert to fraction form
   112,784.06/155,647.17 = 64,399.09/x
3. Step 3: Cross multiply
   112,784.06x = 155,647.17 × 64,399.09
4. Step 4: Simplify right side
   112,784.06x = 10,023,536,109.08
5. Step 5: Solve for x
   x = 10,023,536,109.08/112,784.06
6. Step 6: Final answer
   x = 88,873.69