Finding the Fourth Proportional to 42,680,311.14, 64,032,453.89 and 17,139,256.68

Step by Step Solution

1. Step 1: Write the proportion equation
   42,680,311.14 : 64,032,453.89 = 17,139,256.68 : x
2. Step 2: Convert to fraction form
   42,680,311.14/64,032,453.89 = 17,139,256.68/x
3. Step 3: Cross multiply
   42,680,311.14x = 64,032,453.89 × 17,139,256.68
4. Step 4: Simplify right side
   42,680,311.14x = 1,097,468,662,985,278.12
5. Step 5: Solve for x
   x = 1,097,468,662,985,278.12/42,680,311.14
6. Step 6: Final answer
   x = 25,713,698.74