Finding the Fourth Proportional to 120,774.01, 180,347.72 and 98,631.31

Step by Step Solution

1. Step 1: Write the proportion equation
   120,774.01 : 180,347.72 = 98,631.31 : x
2. Step 2: Convert to fraction form
   120,774.01/180,347.72 = 98,631.31/x
3. Step 3: Cross multiply
   120,774.01x = 180,347.72 × 98,631.31
4. Step 4: Simplify right side
   120,774.01x = 17,787,931,100.66
5. Step 5: Solve for x
   x = 17,787,931,100.66/120,774.01
6. Step 6: Final answer
   x = 147,282.78