Finding the Fourth Proportional to 2,590.60, 3,887.46 and 947.02

Step by Step Solution

1. Step 1: Write the proportion equation
   2,590.60 : 3,887.46 = 947.02 : x
2. Step 2: Convert to fraction form
   2,590.60/3,887.46 = 947.02/x
3. Step 3: Cross multiply
   2,590.60x = 3,887.46 × 947.02
4. Step 4: Simplify right side
   2,590.60x = 3,681,502.37
5. Step 5: Solve for x
   x = 3,681,502.37/2,590.60
6. Step 6: Final answer
   x = 1,421.10