Finding the Fourth Proportional to 87,897.89, 131,795.98 and 77,389.02

Step by Step Solution

1. Step 1: Write the proportion equation
   87,897.89 : 131,795.98 = 77,389.02 : x
2. Step 2: Convert to fraction form
   87,897.89/131,795.98 = 77,389.02/x
3. Step 3: Cross multiply
   87,897.89x = 131,795.98 × 77,389.02
4. Step 4: Simplify right side
   87,897.89x = 10,199,561,538.67
5. Step 5: Solve for x
   x = 10,199,561,538.67/87,897.89
6. Step 6: Final answer
   x = 116,038.75