Finding the Fourth Proportional to 99,029.32, 136,713.56 and 76,485

Step by Step Solution

1. Step 1: Write the proportion equation
   99,029.32 : 136,713.56 = 76,485 : x
2. Step 2: Convert to fraction form
   99,029.32/136,713.56 = 76,485/x
3. Step 3: Cross multiply
   99,029.32x = 136,713.56 × 76,485
4. Step 4: Simplify right side
   99,029.32x = 10,456,536,636.60
5. Step 5: Solve for x
   x = 10,456,536,636.60/99,029.32
6. Step 6: Final answer
   x = 105,590.31