Finding the Fourth Proportional to 165,931.31, 248,897.10 and 71,099.98

Step by Step Solution

1. Step 1: Write the proportion equation
   165,931.31 : 248,897.10 = 71,099.98 : x
2. Step 2: Convert to fraction form
   165,931.31/248,897.10 = 71,099.98/x
3. Step 3: Cross multiply
   165,931.31x = 248,897.10 × 71,099.98
4. Step 4: Simplify right side
   165,931.31x = 17,696,578,476.44
5. Step 5: Solve for x
   x = 17,696,578,476.44/165,931.31
6. Step 6: Final answer
   x = 106,650.03