Finding the Fourth Proportional to 112,131.02, 168,308.76 and 80,578.10

Step by Step Solution

1. Step 1: Write the proportion equation
   112,131.02 : 168,308.76 = 80,578.10 : x
2. Step 2: Convert to fraction form
   112,131.02/168,308.76 = 80,578.10/x
3. Step 3: Cross multiply
   112,131.02x = 168,308.76 × 80,578.10
4. Step 4: Simplify right side
   112,131.02x = 13,562,000,094.16
5. Step 5: Solve for x
   x = 13,562,000,094.16/112,131.02
6. Step 6: Final answer
   x = 120,947.80