Finding the Fourth Proportional to 99,081.33, 136,727.91 and 56,642.60

Step by Step Solution

1. Step 1: Write the proportion equation
   99,081.33 : 136,727.91 = 56,642.60 : x
2. Step 2: Convert to fraction form
   99,081.33/136,727.91 = 56,642.60/x
3. Step 3: Cross multiply
   99,081.33x = 136,727.91 × 56,642.60
4. Step 4: Simplify right side
   99,081.33x = 7,744,623,631.33
5. Step 5: Solve for x
   x = 7,744,623,631.33/99,081.33
6. Step 6: Final answer
   x = 78,164.31