Finding the Fourth Proportional to 213,931,456.86, 320,803,738.29 and 75,711,144.72

Step by Step Solution

1. Step 1: Write the proportion equation
   213,931,456.86 : 320,803,738.29 = 75,711,144.72 : x
2. Step 2: Convert to fraction form
   213,931,456.86/320,803,738.29 = 75,711,144.72/x
3. Step 3: Cross multiply
   213,931,456.86x = 320,803,738.29 × 75,711,144.72
4. Step 4: Simplify right side
   213,931,456.86x = 24,288,418,256,391,196
5. Step 5: Solve for x
   x = 24,288,418,256,391,196/213,931,456.86
6. Step 6: Final answer
   x = 113,533,645.84