Finding the Fourth Proportional to 91,436, 137,102.16 and 38,066.40

Step by Step Solution

1. Step 1: Write the proportion equation
   91,436 : 137,102.16 = 38,066.40 : x
2. Step 2: Convert to fraction form
   91,436/137,102.16 = 38,066.40/x
3. Step 3: Cross multiply
   91,436x = 137,102.16 × 38,066.40
4. Step 4: Simplify right side
   91,436x = 5,218,985,663.42
5. Step 5: Solve for x
   x = 5,218,985,663.42/91,436
6. Step 6: Final answer
   x = 57,078.02