Finding the Fourth Proportional to 1,137,928.72, 1,706,958.72 and 427,962.88

Step by Step Solution

1. Step 1: Write the proportion equation
   1,137,928.72 : 1,706,958.72 = 427,962.88 : x
2. Step 2: Convert to fraction form
   1,137,928.72/1,706,958.72 = 427,962.88/x
3. Step 3: Cross multiply
   1,137,928.72x = 1,706,958.72 × 427,962.88
4. Step 4: Simplify right side
   1,137,928.72x = 730,514,969,852.31
5. Step 5: Solve for x
   x = 730,514,969,852.31/1,137,928.72
6. Step 6: Final answer
   x = 641,969.01