Finding the Fourth Proportional to 154,957,870.98, 213,851,533.32 and 85,343,233.42

Step by Step Solution

1. Step 1: Write the proportion equation
   154,957,870.98 : 213,851,533.32 = 85,343,233.42 : x
2. Step 2: Convert to fraction form
   154,957,870.98/213,851,533.32 = 85,343,233.42/x
3. Step 3: Cross multiply
   154,957,870.98x = 213,851,533.32 × 85,343,233.42
4. Step 4: Simplify right side
   154,957,870.98x = 18,250,781,325,353,668
5. Step 5: Solve for x
   x = 18,250,781,325,353,668/154,957,870.98
6. Step 6: Final answer
   x = 117,778,988.64