Finding the Fourth Proportional to 42,849,132.30, 64,265,105.08 and 20,980,089.11

Step by Step Solution

1. Step 1: Write the proportion equation
   42,849,132.30 : 64,265,105.08 = 20,980,089.11 : x
2. Step 2: Convert to fraction form
   42,849,132.30/64,265,105.08 = 20,980,089.11/x
3. Step 3: Cross multiply
   42,849,132.30x = 64,265,105.08 × 20,980,089.11
4. Step 4: Simplify right side
   42,849,132.30x = 1,348,287,631,428,801.50
5. Step 5: Solve for x
   x = 1,348,287,631,428,801.50/42,849,132.30
6. Step 6: Final answer
   x = 31,465,926.12