Finding the Fourth Proportional to 991,061.10, 1,486,591.65 and 816,101.10

Step by Step Solution

1. Step 1: Write the proportion equation
   991,061.10 : 1,486,591.65 = 816,101.10 : x
2. Step 2: Convert to fraction form
   991,061.10/1,486,591.65 = 816,101.10/x
3. Step 3: Cross multiply
   991,061.10x = 1,486,591.65 × 816,101.10
4. Step 4: Simplify right side
   991,061.10x = 1,213,209,080,815.82
5. Step 5: Solve for x
   x = 1,213,209,080,815.82/991,061.10
6. Step 6: Final answer
   x = 1,224,151.65