Finding the Fourth Proportional to 1,172,554.71, 1,618,109.63 and 656,308.47

Step by Step Solution

1. Step 1: Write the proportion equation
   1,172,554.71 : 1,618,109.63 = 656,308.47 : x
2. Step 2: Convert to fraction form
   1,172,554.71/1,618,109.63 = 656,308.47/x
3. Step 3: Cross multiply
   1,172,554.71x = 1,618,109.63 × 656,308.47
4. Step 4: Simplify right side
   1,172,554.71x = 1,061,979,052,276.02
5. Step 5: Solve for x
   x = 1,061,979,052,276.02/1,172,554.71
6. Step 6: Final answer
   x = 905,696.80