Finding the Fourth Proportional to 9,123.64, 12,590.35 and 5,090.58

Step by Step Solution

1. Step 1: Write the proportion equation
   9,123.64 : 12,590.35 = 5,090.58 : x
2. Step 2: Convert to fraction form
   9,123.64/12,590.35 = 5,090.58/x
3. Step 3: Cross multiply
   9,123.64x = 12,590.35 × 5,090.58
4. Step 4: Simplify right side
   9,123.64x = 64,092,199.81
5. Step 5: Solve for x
   x = 64,092,199.81/9,123.64
6. Step 6: Final answer
   x = 7,024.85