Finding the Fourth Proportional to 168,075,112.72, 231,943,656 and 90,812,776.72

Step by Step Solution

1. Step 1: Write the proportion equation
   168,075,112.72 : 231,943,656 = 90,812,776.72 : x
2. Step 2: Convert to fraction form
   168,075,112.72/231,943,656 = 90,812,776.72/x
3. Step 3: Cross multiply
   168,075,112.72x = 231,943,656 × 90,812,776.72
4. Step 4: Simplify right side
   168,075,112.72x = 21,063,447,443,948,488
5. Step 5: Solve for x
   x = 21,063,447,443,948,488/168,075,112.72
6. Step 6: Final answer
   x = 125,321,632.11