Finding the Fourth Proportional to 86,803.00, 129,992.15 and 78,388.52

Step by Step Solution

1. Step 1: Write the proportion equation
   86,803.00 : 129,992.15 = 78,388.52 : x
2. Step 2: Convert to fraction form
   86,803.00/129,992.15 = 78,388.52/x
3. Step 3: Cross multiply
   86,803.00x = 129,992.15 × 78,388.52
4. Step 4: Simplify right side
   86,803.00x = 10,189,891,796.13
5. Step 5: Solve for x
   x = 10,189,891,796.13/86,803.00
6. Step 6: Final answer
   x = 117,391.01