Finding the Fourth Proportional to 28,098.58, 42,168.60 and 13,307.47

Step by Step Solution

1. Step 1: Write the proportion equation
   28,098.58 : 42,168.60 = 13,307.47 : x
2. Step 2: Convert to fraction form
   28,098.58/42,168.60 = 13,307.47/x
3. Step 3: Cross multiply
   28,098.58x = 42,168.60 × 13,307.47
4. Step 4: Simplify right side
   28,098.58x = 561,157,274.02
5. Step 5: Solve for x
   x = 561,157,274.02/28,098.58
6. Step 6: Final answer
   x = 19,971.02