Finding the Fourth Proportional to 42,772,465.72, 64,133,076.86 and 13,613,709.68

Step by Step Solution

1. Step 1: Write the proportion equation
   42,772,465.72 : 64,133,076.86 = 13,613,709.68 : x
2. Step 2: Convert to fraction form
   42,772,465.72/64,133,076.86 = 13,613,709.68/x
3. Step 3: Cross multiply
   42,772,465.72x = 64,133,076.86 × 13,613,709.68
4. Step 4: Simplify right side
   42,772,465.72x = 873,089,089,257,166
5. Step 5: Solve for x
   x = 873,089,089,257,166/42,772,465.72
6. Step 6: Final answer
   x = 20,412,409.59