Finding the Fourth Proportional to 137,746.72, 190,060.86 and 90,070.12

Step by Step Solution

1. Step 1: Write the proportion equation
   137,746.72 : 190,060.86 = 90,070.12 : x
2. Step 2: Convert to fraction form
   137,746.72/190,060.86 = 90,070.12/x
3. Step 3: Cross multiply
   137,746.72x = 190,060.86 × 90,070.12
4. Step 4: Simplify right side
   137,746.72x = 17,118,804,467.50
5. Step 5: Solve for x
   x = 17,118,804,467.50/137,746.72
6. Step 6: Final answer
   x = 124,277.40