Finding the Fourth Proportional to 1,437.83, 2,155.12 and 707.91

Step by Step Solution

1. Step 1: Write the proportion equation
   1,437.83 : 2,155.12 = 707.91 : x
2. Step 2: Convert to fraction form
   1,437.83/2,155.12 = 707.91/x
3. Step 3: Cross multiply
   1,437.83x = 2,155.12 × 707.91
4. Step 4: Simplify right side
   1,437.83x = 1,525,636.43
5. Step 5: Solve for x
   x = 1,525,636.43/1,437.83
6. Step 6: Final answer
   x = 1,061.07