Finding the Fourth Proportional to 91,188.72, 136,828.44 and 51,182.82

Step by Step Solution

1. Step 1: Write the proportion equation
   91,188.72 : 136,828.44 = 51,182.82 : x
2. Step 2: Convert to fraction form
   91,188.72/136,828.44 = 51,182.82/x
3. Step 3: Cross multiply
   91,188.72x = 136,828.44 × 51,182.82
4. Step 4: Simplify right side
   91,188.72x = 7,003,265,415.40
5. Step 5: Solve for x
   x = 7,003,265,415.40/91,188.72
6. Step 6: Final answer
   x = 76,799.69