Finding the Fourth Proportional to 82,790,388.48, 113,423,237.60 and 79,687,413.12

Step by Step Solution

1. Step 1: Write the proportion equation
   82,790,388.48 : 113,423,237.60 = 79,687,413.12 : x
2. Step 2: Convert to fraction form
   82,790,388.48/113,423,237.60 = 79,687,413.12/x
3. Step 3: Cross multiply
   82,790,388.48x = 113,423,237.60 × 79,687,413.12
4. Step 4: Simplify right side
   82,790,388.48x = 9,038,404,392,039,118
5. Step 5: Solve for x
   x = 9,038,404,392,039,118/82,790,388.48
6. Step 6: Final answer
   x = 109,172,146.16