Finding the Fourth Proportional to 89,676,040.20, 134,766,002.70 and 78,590,574.60

Step by Step Solution

1. Step 1: Write the proportion equation
   89,676,040.20 : 134,766,002.70 = 78,590,574.60 : x
2. Step 2: Convert to fraction form
   89,676,040.20/134,766,002.70 = 78,590,574.60/x
3. Step 3: Cross multiply
   89,676,040.20x = 134,766,002.70 × 78,590,574.60
4. Step 4: Simplify right side
   89,676,040.20x = 10,591,337,588,738,150
5. Step 5: Solve for x
   x = 10,591,337,588,738,150/89,676,040.20
6. Step 6: Final answer
   x = 118,106,659.99