Finding the Fourth Proportional to 42,970,648.91, 64,412,875.76 and 19,957,744.85

Step by Step Solution

1. Step 1: Write the proportion equation
   42,970,648.91 : 64,412,875.76 = 19,957,744.85 : x
2. Step 2: Convert to fraction form
   42,970,648.91/64,412,875.76 = 19,957,744.85/x
3. Step 3: Cross multiply
   42,970,648.91x = 64,412,875.76 × 19,957,744.85
4. Step 4: Simplify right side
   42,970,648.91x = 1,285,535,739,050,976.75
5. Step 5: Solve for x
   x = 1,285,535,739,050,976.75/42,970,648.91
6. Step 6: Final answer
   x = 29,916,600.56