Finding the Fourth Proportional to 91,559,632.50, 126,321,043.50 and 56,739,618.18

Step by Step Solution

1. Step 1: Write the proportion equation
   91,559,632.50 : 126,321,043.50 = 56,739,618.18 : x
2. Step 2: Convert to fraction form
   91,559,632.50/126,321,043.50 = 56,739,618.18/x
3. Step 3: Cross multiply
   91,559,632.50x = 126,321,043.50 × 56,739,618.18
4. Step 4: Simplify right side
   91,559,632.50x = 7,167,407,776,289,171
5. Step 5: Solve for x
   x = 7,167,407,776,289,171/91,559,632.50
6. Step 6: Final answer
   x = 78,281,307.83