Finding the Fourth Proportional to 5,479,945.60, 7,688,720 and 5,479,945.60

Step by Step Solution

1. Step 1: Write the proportion equation
   5,479,945.60 : 7,688,720 = 5,479,945.60 : x
2. Step 2: Convert to fraction form
   5,479,945.60/7,688,720 = 5,479,945.60/x
3. Step 3: Cross multiply
   5,479,945.60x = 7,688,720 × 5,479,945.60
4. Step 4: Simplify right side
   5,479,945.60x = 42,133,767,333,632
5. Step 5: Solve for x
   x = 42,133,767,333,632/5,479,945.60
6. Step 6: Final answer
   x = 7,688,720.00