Finding the Fourth Proportional to 991,017.72, 1,367,605.80 and 538,308.72

Step by Step Solution

1. Step 1: Write the proportion equation
   991,017.72 : 1,367,605.80 = 538,308.72 : x
2. Step 2: Convert to fraction form
   991,017.72/1,367,605.80 = 538,308.72/x
3. Step 3: Cross multiply
   991,017.72x = 1,367,605.80 × 538,308.72
4. Step 4: Simplify right side
   991,017.72x = 736,194,127,662.58
5. Step 5: Solve for x
   x = 736,194,127,662.58/991,017.72
6. Step 6: Final answer
   x = 742,866.76