Finding the Fourth Proportional to 13,159.61, 19,748.94 and 5,155.57

Step by Step Solution

1. Step 1: Write the proportion equation
   13,159.61 : 19,748.94 = 5,155.57 : x
2. Step 2: Convert to fraction form
   13,159.61/19,748.94 = 5,155.57/x
3. Step 3: Cross multiply
   13,159.61x = 19,748.94 × 5,155.57
4. Step 4: Simplify right side
   13,159.61x = 101,817,047.95
5. Step 5: Solve for x
   x = 101,817,047.95/13,159.61
6. Step 6: Final answer
   x = 7,737.09