Finding the Fourth Proportional to 11,601.90, 17,402.31 and 3,810.78

Step by Step Solution

1. Step 1: Write the proportion equation
   11,601.90 : 17,402.31 = 3,810.78 : x
2. Step 2: Convert to fraction form
   11,601.90/17,402.31 = 3,810.78/x
3. Step 3: Cross multiply
   11,601.90x = 17,402.31 × 3,810.78
4. Step 4: Simplify right side
   11,601.90x = 66,316,374.90
5. Step 5: Solve for x
   x = 66,316,374.90/11,601.90
6. Step 6: Final answer
   x = 5,715.99