Finding the Fourth Proportional to 7,870.87, 11,792.39 and 7,402.59

Step by Step Solution

1. Step 1: Write the proportion equation
   7,870.87 : 11,792.39 = 7,402.59 : x
2. Step 2: Convert to fraction form
   7,870.87/11,792.39 = 7,402.59/x
3. Step 3: Cross multiply
   7,870.87x = 11,792.39 × 7,402.59
4. Step 4: Simplify right side
   7,870.87x = 87,294,191.28
5. Step 5: Solve for x
   x = 87,294,191.28/7,870.87
6. Step 6: Final answer
   x = 11,090.79