Finding the Fourth Proportional to 138,526,851.78, 191,083,763.61 and 91,484,358.12

Step by Step Solution

1. Step 1: Write the proportion equation
   138,526,851.78 : 191,083,763.61 = 91,484,358.12 : x
2. Step 2: Convert to fraction form
   138,526,851.78/191,083,763.61 = 91,484,358.12/x
3. Step 3: Cross multiply
   138,526,851.78x = 191,083,763.61 × 91,484,358.12
4. Step 4: Simplify right side
   138,526,851.78x = 17,481,175,461,014,666
5. Step 5: Solve for x
   x = 17,481,175,461,014,666/138,526,851.78
6. Step 6: Final answer
   x = 126,193,407.53