Finding the Fourth Proportional to 91,897.36, 126,866.52 and 61,840.72

Step by Step Solution

1. Step 1: Write the proportion equation
   91,897.36 : 126,866.52 = 61,840.72 : x
2. Step 2: Convert to fraction form
   91,897.36/126,866.52 = 61,840.72/x
3. Step 3: Cross multiply
   91,897.36x = 126,866.52 × 61,840.72
4. Step 4: Simplify right side
   91,897.36x = 7,845,516,940.69
5. Step 5: Solve for x
   x = 7,845,516,940.69/91,897.36
6. Step 6: Final answer
   x = 85,372.60