Finding the Fourth Proportional to 91,363,793.80, 126,112,185.78 and 81,678,282.80

Step by Step Solution

1. Step 1: Write the proportion equation
   91,363,793.80 : 126,112,185.78 = 81,678,282.80 : x
2. Step 2: Convert to fraction form
   91,363,793.80/126,112,185.78 = 81,678,282.80/x
3. Step 3: Cross multiply
   91,363,793.80x = 126,112,185.78 × 81,678,282.80
4. Step 4: Simplify right side
   91,363,793.80x = 10,300,626,774,664,978
5. Step 5: Solve for x
   x = 10,300,626,774,664,978/91,363,793.80
6. Step 6: Final answer
   x = 112,742,984.35