Finding the Fourth Proportional to 42,849,134.19, 64,265,107.89 and 20,980,090.98

Step by Step Solution

1. Step 1: Write the proportion equation
   42,849,134.19 : 64,265,107.89 = 20,980,090.98 : x
2. Step 2: Convert to fraction form
   42,849,134.19/64,265,107.89 = 20,980,090.98/x
3. Step 3: Cross multiply
   42,849,134.19x = 64,265,107.89 × 20,980,090.98
4. Step 4: Simplify right side
   42,849,134.19x = 1,348,287,810,371,715.75
5. Step 5: Solve for x
   x = 1,348,287,810,371,715.75/42,849,134.19
6. Step 6: Final answer
   x = 31,465,928.91