Finding the Fourth Proportional to 101,973.30, 152,810.55 and 91,443.30

Step by Step Solution

1. Step 1: Write the proportion equation
   101,973.30 : 152,810.55 = 91,443.30 : x
2. Step 2: Convert to fraction form
   101,973.30/152,810.55 = 91,443.30/x
3. Step 3: Cross multiply
   101,973.30x = 152,810.55 × 91,443.30
4. Step 4: Simplify right side
   101,973.30x = 13,973,500,966.82
5. Step 5: Solve for x
   x = 13,973,500,966.82/101,973.30
6. Step 6: Final answer
   x = 137,030.98