Finding the Fourth Proportional to 9,810.18, 13,538.34 and 7,156.62

Step by Step Solution

1. Step 1: Write the proportion equation
   9,810.18 : 13,538.34 = 7,156.62 : x
2. Step 2: Convert to fraction form
   9,810.18/13,538.34 = 7,156.62/x
3. Step 3: Cross multiply
   9,810.18x = 13,538.34 × 7,156.62
4. Step 4: Simplify right side
   9,810.18x = 96,888,754.81
5. Step 5: Solve for x
   x = 96,888,754.81/9,810.18
6. Step 6: Final answer
   x = 9,876.35