Finding the Fourth Proportional to 42,849,132.80, 64,265,105.83 and 20,980,089.62

Step by Step Solution

1. Step 1: Write the proportion equation
   42,849,132.80 : 64,265,105.83 = 20,980,089.62 : x
2. Step 2: Convert to fraction form
   42,849,132.80/64,265,105.83 = 20,980,089.62/x
3. Step 3: Cross multiply
   42,849,132.80x = 64,265,105.83 × 20,980,089.62
4. Step 4: Simplify right side
   42,849,132.80x = 1,348,287,679,430,858.75
5. Step 5: Solve for x
   x = 1,348,287,679,430,858.75/42,849,132.80
6. Step 6: Final answer
   x = 31,465,926.88