Finding the Fourth Proportional to 10,012.55, 13,802.59 and 7,881.26

Step by Step Solution

1. Step 1: Write the proportion equation
   10,012.55 : 13,802.59 = 7,881.26 : x
2. Step 2: Convert to fraction form
   10,012.55/13,802.59 = 7,881.26/x
3. Step 3: Cross multiply
   10,012.55x = 13,802.59 × 7,881.26
4. Step 4: Simplify right side
   10,012.55x = 108,781,711.75
5. Step 5: Solve for x
   x = 108,781,711.75/10,012.55
6. Step 6: Final answer
   x = 10,864.53