Finding the Fourth Proportional to 42,708,808.72, 64,074,137.16 and 12,416,671.72

Step by Step Solution

1. Step 1: Write the proportion equation
   42,708,808.72 : 64,074,137.16 = 12,416,671.72 : x
2. Step 2: Convert to fraction form
   42,708,808.72/64,074,137.16 = 12,416,671.72/x
3. Step 3: Cross multiply
   42,708,808.72x = 64,074,137.16 × 12,416,671.72
4. Step 4: Simplify right side
   42,708,808.72x = 795,587,526,857,973.12
5. Step 5: Solve for x
   x = 795,587,526,857,973.12/42,708,808.72
6. Step 6: Final answer
   x = 18,628,183.52