Finding the Fourth Proportional to 1,430.30, 1,977.43 and 1,056.69

Step by Step Solution

1. Step 1: Write the proportion equation
   1,430.30 : 1,977.43 = 1,056.69 : x
2. Step 2: Convert to fraction form
   1,430.30/1,977.43 = 1,056.69/x
3. Step 3: Cross multiply
   1,430.30x = 1,977.43 × 1,056.69
4. Step 4: Simplify right side
   1,430.30x = 2,089,525.22
5. Step 5: Solve for x
   x = 2,089,525.22/1,430.30
6. Step 6: Final answer
   x = 1,460.90