Finding the Fourth Proportional to 99,707.31, 137,646.88 and 76,995.32

Step by Step Solution

1. Step 1: Write the proportion equation
   99,707.31 : 137,646.88 = 76,995.32 : x
2. Step 2: Convert to fraction form
   99,707.31/137,646.88 = 76,995.32/x
3. Step 3: Cross multiply
   99,707.31x = 137,646.88 × 76,995.32
4. Step 4: Simplify right side
   99,707.31x = 10,598,164,884.37
5. Step 5: Solve for x
   x = 10,598,164,884.37/99,707.31
6. Step 6: Final answer
   x = 106,292.76