Finding the Fourth Proportional to 42,061,608.79, 63,039,341.21 and 21,317,259.06

Step by Step Solution

1. Step 1: Write the proportion equation
   42,061,608.79 : 63,039,341.21 = 21,317,259.06 : x
2. Step 2: Convert to fraction form
   42,061,608.79/63,039,341.21 = 21,317,259.06/x
3. Step 3: Cross multiply
   42,061,608.79x = 63,039,341.21 × 21,317,259.06
4. Step 4: Simplify right side
   42,061,608.79x = 1,343,825,967,438,717.50
5. Step 5: Solve for x
   x = 1,343,825,967,438,717.50/42,061,608.79
6. Step 6: Final answer
   x = 31,948,991.16