Finding the Fourth Proportional to 780,059.55, 1,170,089.33 and 543,669.15

Step by Step Solution

1. Step 1: Write the proportion equation
   780,059.55 : 1,170,089.33 = 543,669.15 : x
2. Step 2: Convert to fraction form
   780,059.55/1,170,089.33 = 543,669.15/x
3. Step 3: Cross multiply
   780,059.55x = 1,170,089.33 × 543,669.15
4. Step 4: Simplify right side
   780,059.55x = 636,141,468,746.82
5. Step 5: Solve for x
   x = 636,141,468,746.82/780,059.55
6. Step 6: Final answer
   x = 815,503.73