Finding the Fourth Proportional to 890,300.61, 1,336,784.99 and 770,726.39

Step by Step Solution

1. Step 1: Write the proportion equation
   890,300.61 : 1,336,784.99 = 770,726.39 : x
2. Step 2: Convert to fraction form
   890,300.61/1,336,784.99 = 770,726.39/x
3. Step 3: Cross multiply
   890,300.61x = 1,336,784.99 × 770,726.39
4. Step 4: Simplify right side
   890,300.61x = 1,030,295,459,011.33
5. Step 5: Solve for x
   x = 1,030,295,459,011.33/890,300.61
6. Step 6: Final answer
   x = 1,157,244.47