Finding the Fourth Proportional to 13,312.69, 19,962.89 and 4,986.75

Step by Step Solution

1. Step 1: Write the proportion equation
   13,312.69 : 19,962.89 = 4,986.75 : x
2. Step 2: Convert to fraction form
   13,312.69/19,962.89 = 4,986.75/x
3. Step 3: Cross multiply
   13,312.69x = 19,962.89 × 4,986.75
4. Step 4: Simplify right side
   13,312.69x = 99,549,941.71
5. Step 5: Solve for x
   x = 99,549,941.71/13,312.69
6. Step 6: Final answer
   x = 7,477.82