Finding the Fourth Proportional to 99,196.22, 136,907.61 and 58,931.72

Step by Step Solution

1. Step 1: Write the proportion equation
   99,196.22 : 136,907.61 = 58,931.72 : x
2. Step 2: Convert to fraction form
   99,196.22/136,907.61 = 58,931.72/x
3. Step 3: Cross multiply
   99,196.22x = 136,907.61 × 58,931.72
4. Step 4: Simplify right side
   99,196.22x = 8,068,200,253.85
5. Step 5: Solve for x
   x = 8,068,200,253.85/99,196.22
6. Step 6: Final answer
   x = 81,335.77