Finding the Fourth Proportional to 1,051.34, 1,567.83 and 921.93

Step by Step Solution

1. Step 1: Write the proportion equation
   1,051.34 : 1,567.83 = 921.93 : x
2. Step 2: Convert to fraction form
   1,051.34/1,567.83 = 921.93/x
3. Step 3: Cross multiply
   1,051.34x = 1,567.83 × 921.93
4. Step 4: Simplify right side
   1,051.34x = 1,445,429.51
5. Step 5: Solve for x
   x = 1,445,429.51/1,051.34
6. Step 6: Final answer
   x = 1,374.85