Finding the Fourth Proportional to 78,411, 108,296.28 and 53,216.76

Step by Step Solution

1. Step 1: Write the proportion equation
   78,411 : 108,296.28 = 53,216.76 : x
2. Step 2: Convert to fraction form
   78,411/108,296.28 = 53,216.76/x
3. Step 3: Cross multiply
   78,411x = 108,296.28 × 53,216.76
4. Step 4: Simplify right side
   78,411x = 5,763,177,141.65
5. Step 5: Solve for x
   x = 5,763,177,141.65/78,411
6. Step 6: Final answer
   x = 73,499.60