Finding the Fourth Proportional to 99,401.99, 136,985.78 and 71,058.47

Step by Step Solution

1. Step 1: Write the proportion equation
   99,401.99 : 136,985.78 = 71,058.47 : x
2. Step 2: Convert to fraction form
   99,401.99/136,985.78 = 71,058.47/x
3. Step 3: Cross multiply
   99,401.99x = 136,985.78 × 71,058.47
4. Step 4: Simplify right side
   99,401.99x = 9,733,999,431.27
5. Step 5: Solve for x
   x = 9,733,999,431.27/99,401.99
6. Step 6: Final answer
   x = 97,925.60