Finding the Fourth Proportional to 212,899.76, 293,795.88 and 117,404.72

Step by Step Solution

1. Step 1: Write the proportion equation
   212,899.76 : 293,795.88 = 117,404.72 : x
2. Step 2: Convert to fraction form
   212,899.76/293,795.88 = 117,404.72/x
3. Step 3: Cross multiply
   212,899.76x = 293,795.88 × 117,404.72
4. Step 4: Simplify right side
   212,899.76x = 34,493,023,028.55
5. Step 5: Solve for x
   x = 34,493,023,028.55/212,899.76
6. Step 6: Final answer
   x = 162,015.32