Finding the Fourth Proportional to 1,312,296.72, 1,810,969.60 and 708,684.72

Step by Step Solution

1. Step 1: Write the proportion equation
   1,312,296.72 : 1,810,969.60 = 708,684.72 : x
2. Step 2: Convert to fraction form
   1,312,296.72/1,810,969.60 = 708,684.72/x
3. Step 3: Cross multiply
   1,312,296.72x = 1,810,969.60 × 708,684.72
4. Step 4: Simplify right side
   1,312,296.72x = 1,283,406,483,904.51
5. Step 5: Solve for x
   x = 1,283,406,483,904.51/1,312,296.72
6. Step 6: Final answer
   x = 977,984.98