Finding the Fourth Proportional to 59,861,676.80, 89,568,307.20 and 42,629,715.20

Step by Step Solution

1. Step 1: Write the proportion equation
   59,861,676.80 : 89,568,307.20 = 42,629,715.20 : x
2. Step 2: Convert to fraction form
   59,861,676.80/89,568,307.20 = 42,629,715.20/x
3. Step 3: Cross multiply
   59,861,676.80x = 89,568,307.20 × 42,629,715.20
4. Step 4: Simplify right side
   59,861,676.80x = 3,818,271,426,882,110
5. Step 5: Solve for x
   x = 3,818,271,426,882,110/59,861,676.80
6. Step 6: Final answer
   x = 63,784,905.99