Finding the Fourth Proportional to 111,380,634.18, 153,702,958.86 and 61,818,100.25

Step by Step Solution

1. Step 1: Write the proportion equation
   111,380,634.18 : 153,702,958.86 = 61,818,100.25 : x
2. Step 2: Convert to fraction form
   111,380,634.18/153,702,958.86 = 61,818,100.25/x
3. Step 3: Cross multiply
   111,380,634.18x = 153,702,958.86 × 61,818,100.25
4. Step 4: Simplify right side
   111,380,634.18x = 9,501,624,918,760,592
5. Step 5: Solve for x
   x = 9,501,624,918,760,592/111,380,634.18
6. Step 6: Final answer
   x = 85,307,692.75