Finding the Fourth Proportional to 290,012,904.99, 435,007,559.69 and 71,657,748.15

Step by Step Solution

1. Step 1: Write the proportion equation
   290,012,904.99 : 435,007,559.69 = 71,657,748.15 : x
2. Step 2: Convert to fraction form
   290,012,904.99/435,007,559.69 = 71,657,748.15/x
3. Step 3: Cross multiply
   290,012,904.99x = 435,007,559.69 × 71,657,748.15
4. Step 4: Simplify right side
   290,012,904.99x = 31,171,662,155,253,828
5. Step 5: Solve for x
   x = 31,171,662,155,253,828/290,012,904.99
6. Step 6: Final answer
   x = 107,483,707.17